Outputs (137)

Tripartite quantum Rabi model with trapped Rydberg ions (2024)
Journal Article
Hamlyn, T. J., Zhang, C., Lesanovsky, I., & Li, W. (in press). Tripartite quantum Rabi model with trapped Rydberg ions. Physical Review Research,

We investigate a tripartite quantum Rabi model (TQRM) wherein a bosonic mode concurrently couples to two spin-1/2 particles through a spin-spin interaction, resulting in a spin-spin-boson coupling-a departure from conventional quantum Rabi models fea... Read More about Tripartite quantum Rabi model with trapped Rydberg ions.

Universal and nonuniversal probability laws in Markovian open quantum dynamics subject to generalized reset processes (2024)
Journal Article
Carollo, F., Lesanovsky, I., & Garrahan, J. P. (2024). Universal and nonuniversal probability laws in Markovian open quantum dynamics subject to generalized reset processes. Physical Review E, 109(4), Article 044129. https://doi.org/10.1103/physreve.109.044129

We consider quantum-jump trajectories of Markovian open quantum systems subject to stochastic in time resets of their state to an initial configuration. The reset events provide a partitioning of quantum trajectories into consecutive time intervals,... Read More about Universal and nonuniversal probability laws in Markovian open quantum dynamics subject to generalized reset processes.

Inferring interpretable dynamical generators of local quantum observables from projective measurements through machine learning (2024)
Journal Article
Cemin, G., Carnazza, F., Andergassen, S., Martius, G., Carollo, F., & Lesanovsky, I. (2024). Inferring interpretable dynamical generators of local quantum observables from projective measurements through machine learning. Physical Review Applied, 21(4), Article L041001. https://doi.org/10.1103/physrevapplied.21.l041001

To characterize the dynamical behavior of many-body quantum systems, one is usually interested in the evolution of so-called order parameters rather than in characterizing the full quantum state. In many situations, these quantities coincide with the... Read More about Inferring interpretable dynamical generators of local quantum observables from projective measurements through machine learning.

Coherent Spin-Phonon Scattering in Facilitated Rydberg Lattices (2024)
Journal Article
Magoni, M., Nill, C., & Lesanovsky, I. (2024). Coherent Spin-Phonon Scattering in Facilitated Rydberg Lattices. Physical Review Letters, 132(13), Article 133401. https://doi.org/10.1103/physrevlett.132.133401

We investigate the dynamics of a one-dimensional spin system with facilitation constraint that can be studied using Rydberg atoms in arrays of optical tweezer traps. The elementary degrees of freedom of the system are domains of Rydberg excitations t... Read More about Coherent Spin-Phonon Scattering in Facilitated Rydberg Lattices.

Numerical simulation of long-range open quantum many-body dynamics with tree tensor networks (2024)
Journal Article
Sulz, D., Lubich, C., Ceruti, G., Lesanovsky, I., & Carollo, F. (2024). Numerical simulation of long-range open quantum many-body dynamics with tree tensor networks. Physical Review A, 109(2), Article 022420. https://doi.org/10.1103/physreva.109.022420

Open quantum systems provide a conceptually simple setting for the exploration of collective behavior stemming from the competition between quantum effects, many-body interactions, and dissipative processes. They may display dynamics distinct from th... Read More about Numerical simulation of long-range open quantum many-body dynamics with tree tensor networks.

Continuous Sensing and Parameter Estimation with the Boundary Time Crystal (2024)
Journal Article
Cabot, A., Carollo, F., & Lesanovsky, I. (2024). Continuous Sensing and Parameter Estimation with the Boundary Time Crystal. Physical Review Letters, 132(5), Article 050801. https://doi.org/10.1103/physrevlett.132.050801

A boundary time crystal is a quantum many-body system whose dynamics is governed by the competition between coherent driving and collective dissipation. It is composed of N two-level systems and features a transition between a stationary phase and an... Read More about Continuous Sensing and Parameter Estimation with the Boundary Time Crystal.

Entangled time-crystal phase in an open quantum light-matter system (2023)
Journal Article
Mattes, R., Lesanovsky, I., & Carollo, F. (2023). Entangled time-crystal phase in an open quantum light-matter system. Physical Review A, 108(6), Article 062216. https://doi.org/10.1103/physreva.108.062216

Time crystals are nonequilibrium many-body phases in which the state of the system dynamically approaches a limit cycle. While these phases have recently been the focus of intensive research, it is still far from clear whether they can host quantum c... Read More about Entangled time-crystal phase in an open quantum light-matter system.

Quantum reaction-limited reaction-diffusion dynamics of annihilation processes (2023)
Journal Article
Perfetto, G., Carollo, F., Garrahan, J. P., & Lesanovsky, I. (2023). Quantum reaction-limited reaction-diffusion dynamics of annihilation processes. Physical Review E, 108(6), Article 064104. https://doi.org/10.1103/physreve.108.064104

We investigate the quantum reaction-diffusion dynamics of fermionic particles which coherently hop in a one-dimensional lattice and undergo annihilation reactions. The latter are modelled as dissipative processes which involve losses of pairs 2A→∅, t... Read More about Quantum reaction-limited reaction-diffusion dynamics of annihilation processes.

Rydberg-ion flywheel for quantum work storage (2023)
Journal Article
Martins, W. S., Carollo, F., Li, W., Brandner, K., & Lesanovsky, I. (2023). Rydberg-ion flywheel for quantum work storage. Physical Review A, 108(5), Article L050201. https://doi.org/10.1103/PhysRevA.108.L050201

Trapped ions provide a platform for quantum technologies that offers long coherence times and high degrees of scalability and controllability. Here, we use this platform to develop a realistic model of a thermal device consisting of two laser-driven,... Read More about Rydberg-ion flywheel for quantum work storage.

Thermodynamics of Quantum Trajectories on a Quantum Computer (2023)
Journal Article
Cech, M., Lesanovsky, I., & Carollo, F. (2023). Thermodynamics of Quantum Trajectories on a Quantum Computer. Physical Review Letters, 131(12), Article 120401. https://doi.org/10.1103/physrevlett.131.120401

Quantum computers have recently become available as noisy intermediate-scale quantum devices. Already these machines yield a useful environment for research on quantum systems and dynamics. Building on this opportunity, we investigate open-system dyn... Read More about Thermodynamics of Quantum Trajectories on a Quantum Computer.

Dissipative quantum many-body dynamics in (1+1)D quantum cellular automata and quantum neural networks (2023)
Journal Article
Boneberg, M., Carollo, F., & Lesanovsky, I. (2023). Dissipative quantum many-body dynamics in (1+1)D quantum cellular automata and quantum neural networks. New Journal of Physics, 25, Article 093020. https://doi.org/10.1088/1367-2630/aceff4

Classical artificial neural networks, built from elementary units, possess enormous expressive power. Here we investigate a quantum neural network architecture, which follows a similar paradigm. It is structurally equivalent to so-called (1+1)D quant... Read More about Dissipative quantum many-body dynamics in (1+1)D quantum cellular automata and quantum neural networks.

Molecular Dynamics in Rydberg Tweezer Arrays: Spin-Phonon Entanglement and Jahn-Teller Effect (2023)
Journal Article
Magoni, M., Joshi, R., & Lesanovsky, I. (2023). Molecular Dynamics in Rydberg Tweezer Arrays: Spin-Phonon Entanglement and Jahn-Teller Effect. Physical Review Letters, 131(9), Article 093002. https://doi.org/10.1103/physrevlett.131.093002

Atoms confined in optical tweezer arrays constitute a platform for the implementation of quantum computers and simulators. State-dependent operations are realized by exploiting electrostatic dipolar interactions that emerge, when two atoms are simult... Read More about Molecular Dynamics in Rydberg Tweezer Arrays: Spin-Phonon Entanglement and Jahn-Teller Effect.

Mean-field dynamics of open quantum systems with collective operator-valued rates: validity and application (2023)
Journal Article
Fiorelli, E., Müller, M., Lesanovsky, I., & Carollo, F. (2023). Mean-field dynamics of open quantum systems with collective operator-valued rates: validity and application. New Journal of Physics, 25(8), Article 083010. https://doi.org/10.1088/1367-2630/ace470

We consider a class of open quantum many-body Lindblad dynamics characterized by an all-to-all coupling Hamiltonian and by dissipation featuring collective ‘state-dependent’ rates. The latter encodes local incoherent transitions that depend on averag... Read More about Mean-field dynamics of open quantum systems with collective operator-valued rates: validity and application.

Reaction-Limited Quantum Reaction-Diffusion Dynamics (2023)
Journal Article
Perfetto, G., Carollo, F., Garrahan, J. P., & Lesanovsky, I. (2023). Reaction-Limited Quantum Reaction-Diffusion Dynamics. Physical Review Letters, 130(21), Article 210402. https://doi.org/10.1103/PhysRevLett.130.210402

We consider the quantum nonequilibrium dynamics of systems where fermionic particles coherently hop on a one-dimensional lattice and are subject to dissipative processes analogous to those of classical reaction-diffusion models. Particles can either... Read More about Reaction-Limited Quantum Reaction-Diffusion Dynamics.

Using (1+1)D quantum cellular automata for exploring collective effects in large-scale quantum neural networks (2023)
Journal Article
Gillman, E., Carollo, F., & Lesanovsky, I. (2023). Using (1+1)D quantum cellular automata for exploring collective effects in large-scale quantum neural networks. Physical Review E, 107(2), Article L022102. https://doi.org/10.1103/PhysRevE.107.L022102

Central to the field of quantum machine learning is the design of quantum perceptrons and neural network architectures. A key question in this regard is the impact of quantum effects on the way such models process information. Here, we establish a co... Read More about Using (1+1)D quantum cellular automata for exploring collective effects in large-scale quantum neural networks.

Collective atom-cavity coupling and nonlinear dynamics with atoms with multilevel ground states (2023)
Journal Article
Suarez, E., Carollo, F., Lesanovsky, I., Olmos, B., Courteille, P. W., & Slama, S. (2023). Collective atom-cavity coupling and nonlinear dynamics with atoms with multilevel ground states. Physical Review A, 107(2), Article 023714. https://doi.org/10.1103/PhysRevA.107.023714

We investigate experimentally and theoretically the collective coupling between atoms with multilevel ground-state manifolds and an optical cavity mode. In our setup the cavity field optically pumps populations among the ground states. The ensuing dy... Read More about Collective atom-cavity coupling and nonlinear dynamics with atoms with multilevel ground states.

Many-Body Radiative Decay in Strongly Interacting Rydberg Ensembles (2022)
Journal Article
Nill, C., Brandner, K., Olmos, B., Carollo, F., & Lesanovsky, I. (2022). Many-Body Radiative Decay in Strongly Interacting Rydberg Ensembles. Physical Review Letters, 129(24), https://doi.org/10.1103/physrevlett.129.243202

When atoms are excited to high-lying Rydberg states they interact strongly with dipolar forces. The resulting state-dependent level shifts allow to study many-body systems displaying intriguing nonequilibrium phenomena, such as constrained spin syste... Read More about Many-Body Radiative Decay in Strongly Interacting Rydberg Ensembles.

Emergent quantum correlations and collective behavior in noninteracting quantum systems subject to stochastic resetting (2022)
Journal Article
Magoni, M., Carollo, F., Perfetto, G., & Lesanovsky, I. (2022). Emergent quantum correlations and collective behavior in noninteracting quantum systems subject to stochastic resetting. Physical Review A, 106(5), Article 052210. https://doi.org/10.1103/physreva.106.052210

We investigate the dynamics of a noninteracting spin system, undergoing coherent Rabi oscillations, in the presence of stochastic resetting. We show that resetting generally induces long-range quantum and classical correlations both in the emergent d... Read More about Emergent quantum correlations and collective behavior in noninteracting quantum systems subject to stochastic resetting.

Thermodynamics of quantum-jump trajectories of open quantum systems subject to stochastic resetting (2022)
Journal Article
Perfetto, G., Carollo, F., & Lesanovsky, I. (2022). Thermodynamics of quantum-jump trajectories of open quantum systems subject to stochastic resetting. SciPost Physics, 13(4), Article 079. https://doi.org/10.21468/SciPostPhys.13.4.079

We consider Markovian open quantum systems subject to stochastic resetting, which means that the dissipative time evolution is reset at randomly distributed times to the initial state. We show that the ensuing dynamics is non-Markovian and has the fo... Read More about Thermodynamics of quantum-jump trajectories of open quantum systems subject to stochastic resetting.

Anderson and many-body localization in the presence of spatially correlated classical noise (2022)
Journal Article
Marcantoni, S., Carollo, F., Gambetta, F. M., Lesanovsky, I., Schneider, U., & Garrahan, J. P. (2022). Anderson and many-body localization in the presence of spatially correlated classical noise. Physical Review B, 106(13), Article 134211. https://doi.org/10.1103/physrevb.106.134211

We study the effect of spatially correlated classical noise on both Anderson and many-body localization of a disordered fermionic chain. By analyzing the evolution of the particle density imbalance following a quench from an initial charge density wa... Read More about Anderson and many-body localization in the presence of spatially correlated classical noise.

Metastable discrete time-crystal resonances in a dissipative central spin system (2022)
Journal Article
Cabot, A., Carollo, F., & Lesanovsky, I. (2022). Metastable discrete time-crystal resonances in a dissipative central spin system. Physical Review B, 106(13), Article 134311. https://doi.org/10.1103/physrevb.106.134311

We consider the nonequilibrium behavior of a central spin system where the central spin is periodically reset to its ground state. The quantum-mechanical evolution under this effectively dissipative dynamics is described by a discrete-time quantum ma... Read More about Metastable discrete time-crystal resonances in a dissipative central spin system.

Asynchronism and nonequilibrium phase transitions in (1+1) -dimensional quantum cellular automata (2022)
Journal Article
Gillman, E., Carollo, F., & Lesanovsky, I. (2022). Asynchronism and nonequilibrium phase transitions in (1+1) -dimensional quantum cellular automata. Physical Review E, 106(3), Article L032103. https://doi.org/10.1103/PhysRevE.106.L032103

Probabilistic cellular automata provide a simple framework for exploring classical nonequilibrium processes. Recently, quantum cellular automata have been proposed that rely on the propagation of a one-dimensional quantum state along a fictitious dis... Read More about Asynchronism and nonequilibrium phase transitions in (1+1) -dimensional quantum cellular automata.

Signatures of a quantum stabilized fluctuating phase and critical dynamics in a kinetically constrained open many-body system with two absorbing states (2022)
Journal Article
Carollo, F., Gnann, M., Perfetto, G., & Lesanovsky, I. (2022). Signatures of a quantum stabilized fluctuating phase and critical dynamics in a kinetically constrained open many-body system with two absorbing states. Physical Review B, 106(9), Article 094315. https://doi.org/10.1103/PhysRevB.106.094315

We introduce and investigate an open many-body quantum system in which kinetically constrained coherent and dissipative processes compete. The form of the incoherent dissipative dynamics is inspired by that of epidemic spreading or cellular-automaton... Read More about Signatures of a quantum stabilized fluctuating phase and critical dynamics in a kinetically constrained open many-body system with two absorbing states.

Inferring Markovian quantum master equations of few-body observables in interacting spin chains (2022)
Journal Article
Carnazza, F., Carollo, F., Zietlow, D., Andergassen, S., Martius, G., & Lesanovsky, I. (2022). Inferring Markovian quantum master equations of few-body observables in interacting spin chains. New Journal of Physics, 24(7), Article 073033. https://doi.org/10.1088/1367-2630/ac7df6

Full information about a many-body quantum system is usually out-of-reach due to the exponential growth - with the size of the system - of the number of parameters needed to encode its state. Nonetheless, in order to understand the complex phenomenol... Read More about Inferring Markovian quantum master equations of few-body observables in interacting spin chains.

Accelerating the approach of dissipative quantum spin systems towards stationarity through global spin rotations (2022)
Journal Article
Kochsiek, S., Carollo, F., & Lesanovsky, I. (2022). Accelerating the approach of dissipative quantum spin systems towards stationarity through global spin rotations. Physical Review A, 106(1), Article 012207. https://doi.org/10.1103/PhysRevA.106.012207

We consider open quantum systems whose dynamics is governed by a time-independent Markovian Lindblad master equation. Such systems approach their stationary state on a timescale that is determined by the spectral gap of the generator of the master eq... Read More about Accelerating the approach of dissipative quantum spin systems towards stationarity through global spin rotations.

Quantum fluctuations and correlations in open quantum Dicke models (2022)
Journal Article
Boneberg, M., Lesanovsky, I., & Carollo, F. (2022). Quantum fluctuations and correlations in open quantum Dicke models. Physical Review A, 106(1), Article 012212. https://doi.org/10.1103/PhysRevA.106.012212

In the vicinity of ground-state phase transitions quantum correlations can display nonanalytic behavior and critical scaling. This signature of emergent collective effects has been widely investigated within a broad range of equilibrium settings. How... Read More about Quantum fluctuations and correlations in open quantum Dicke models.

Phonon dressing of a facilitated one-dimensional Rydberg lattice gas (2022)
Journal Article
Magoni, M., Mazza, P., & Lesanovsky, I. (2022). Phonon dressing of a facilitated one-dimensional Rydberg lattice gas. SciPost Physics Core, 5(3), Article 041. https://doi.org/10.21468/SciPostPhysCore.5.3.041

We study the dynamics of a one-dimensional Rydberg lattice gas under facilitation (antiblockade) conditions which implements a so-called kinetically constrained spin system. Here an atom can only be excited to a Rydberg state when one of its neighbor... Read More about Phonon dressing of a facilitated one-dimensional Rydberg lattice gas.

Fast spin squeezing by distance-selective long-range interactions with Rydberg molecule dressing (2022)
Journal Article
Wu, H., Lin, X. Y., Ding, Z. X., Zheng, S. B., Lesanovsky, I., & Li, W. (2022). Fast spin squeezing by distance-selective long-range interactions with Rydberg molecule dressing. Science China Physics, Mechanics and Astronomy, 65(8), Article 280311. https://doi.org/10.1007/s11433-022-1910-0

We propose a Rydberg molecule dressing scheme to create strong and long-ranged interactions at selective distances. This is achieved through laser coupling ground-state atoms off-resonantly to an attractive molecular curve of two interacting Rydberg... Read More about Fast spin squeezing by distance-selective long-range interactions with Rydberg molecule dressing.

Hierarchical classical metastability in an open quantum East model (2022)
Journal Article
Rose, D. C., MacIeszczak, K., Lesanovsky, I., & Garrahan, J. P. (2022). Hierarchical classical metastability in an open quantum East model. Physical Review E, 105(4), Article 044121. https://doi.org/10.1103/PhysRevE.105.044121

We study in detail an open quantum generalization of a classical kinetically constrained model - the East model - known to exhibit slow glassy dynamics stemming from a complex hierarchy of metastable states with distinct lifetimes. Using the recently... Read More about Hierarchical classical metastability in an open quantum East model.

Exact solution of a boundary time-crystal phase transition: Time-translation symmetry breaking and non-Markovian dynamics of correlations (2022)
Journal Article
Carollo, F., & Lesanovsky, I. (2022). Exact solution of a boundary time-crystal phase transition: Time-translation symmetry breaking and non-Markovian dynamics of correlations. Physical Review A, 105(4), Article L040202. https://doi.org/10.1103/PhysRevA.105.L040202

The breaking of the continuous time-translation symmetry manifests, in Markovian open quantum systems, through the emergence of nonstationary dynamical phases. Systems that display nonequilibrium transitions into these phases are referred to as time... Read More about Exact solution of a boundary time-crystal phase transition: Time-translation symmetry breaking and non-Markovian dynamics of correlations.

Phase diagram of quantum generalized Potts-Hopfield neural networks (2022)
Journal Article
Fiorelli, E., Lesanovsky, I., & Müller, M. (2022). Phase diagram of quantum generalized Potts-Hopfield neural networks. New Journal of Physics, 24(3), Article 033012. https://doi.org/10.1088/1367-2630/ac5490

We introduce and analyze an open quantum generalization of the q-state Potts-Hopfield neural network (NN), which is an associative memory model based on multi-level classical spins. The dynamics of this many-body system is formulated in terms of a Ma... Read More about Phase diagram of quantum generalized Potts-Hopfield neural networks.

Nonequilibrium Dark Space Phase Transition (2022)
Journal Article
Carollo, F., & Lesanovsky, I. (2022). Nonequilibrium Dark Space Phase Transition. Physical Review Letters, 128(4), Article 040603. https://doi.org/10.1103/PhysRevLett.128.040603

We introduce the concept of dark space phase transition, which may occur in open many-body quantum systems where irreversible decay, interactions, and quantum interference compete. Our study is based on a quantum many-body model that is inspired by c... Read More about Nonequilibrium Dark Space Phase Transition.

Quantum and Classical Temporal Correlations in (1+1)D Quantum Cellular Automata (2021)
Journal Article
Gillman, E., Carollo, F., & Lesanovsky, I. (2021). Quantum and Classical Temporal Correlations in (1+1)D Quantum Cellular Automata. Physical Review Letters, 127(23), Article 230502. https://doi.org/10.1103/PhysRevLett.127.230502

We employ (1 + 1)-dimensional quantum cellular automata to study the evolution of entangle-ment and coherence near criticality in quantum systems that display non-equilibrium steady-state phase transitions. This construction permits direct access to... Read More about Quantum and Classical Temporal Correlations in (1+1)D Quantum Cellular Automata.

Multipolar Fermi-surface deformation in a Rydberg-dressed Fermi gas with long-range anisotropic interactions (2021)
Journal Article
Zhou, Y., Nath, R., Wu, H., Lesanovsky, I., & Li, W. (2021). Multipolar Fermi-surface deformation in a Rydberg-dressed Fermi gas with long-range anisotropic interactions. Physical Review A, 104(6), Article L061302. https://doi.org/10.1103/physreva.104.l061302

We study theoretically the deformation of the Fermi surface (FS) of a three-dimensional gas of Rydberg-dressed 6Li atoms. The laser dressing to high-lying Rydberg D states results in angle-dependent soft-core-shaped interactions whose anisotropy is d... Read More about Multipolar Fermi-surface deformation in a Rydberg-dressed Fermi gas with long-range anisotropic interactions.

Designing nonequilibrium states of quantum matter through stochastic resetting (2021)
Journal Article
Perfetto, G., Carollo, F., Magoni, M., & Lesanovsky, I. (2021). Designing nonequilibrium states of quantum matter through stochastic resetting. Physical Review B, 104(18), Article L180302. https://doi.org/10.1103/PhysRevB.104.L180302

We consider closed quantum many-body systems subject to stochastic resetting. This means that their unitary time evolution is interrupted by resets at randomly selected times. When a reset takes place, the system is reinitialized to a state chosen fr... Read More about Designing nonequilibrium states of quantum matter through stochastic resetting.

Bragg condition for scattering into a guided optical mode (2021)
Journal Article
Olmos, B., Liedl, C., Lesanovsky, I., & Schneeweiss, P. (2021). Bragg condition for scattering into a guided optical mode. Physical Review A, 104(4), Article 043517. https://doi.org/10.1103/PhysRevA.104.043517

We theoretically investigate light scattering from an array of atoms into the guided modes of a waveguide. We observe that the scattering of a plane-wave laser field into the waveguide modes is dramatically enhanced for angles that deviate from the g... Read More about Bragg condition for scattering into a guided optical mode.

Dynamical Phases and Quantum Correlations in an Emitter-Waveguide System with Feedback (2021)
Journal Article
Buonaiuto, G., Carollo, F., Olmos, B., & Lesanovsky, I. (2021). Dynamical Phases and Quantum Correlations in an Emitter-Waveguide System with Feedback. Physical Review Letters, 127(13), 1-8. https://doi.org/10.1103/PhysRevLett.127.133601

We investigate the creation and control of emergent collective behavior and quantum correlations using feedback in an emitter-waveguide system using a minimal model. Employing homodyne detection of photons emitted from a laser-driven emitter ensemble... Read More about Dynamical Phases and Quantum Correlations in an Emitter-Waveguide System with Feedback.

Microscopic biasing of discrete-time quantum trajectories (2021)
Journal Article
Cilluffo, D., Buonaiuto, G., Lesanovsky, I., Carollo, A., Lorenzo, S., Palma, G. M., …Carollo, F. (2021). Microscopic biasing of discrete-time quantum trajectories. Quantum Science and Technology, 6(4), Article 045011. https://doi.org/10.1088/2058-9565/ac15e2

We develop a microscopic theory for biasing the quantum trajectories of an open quantum system, which renders rare trajectories typical. To this end we consider a discrete-time quantum dynamics, where the open system collides sequentially with qubit... Read More about Microscopic biasing of discrete-time quantum trajectories.

Collectively Encoded Rydberg Qubit (2021)
Journal Article
Spong, N. L. R., Jiao, Y., Hughes, O. D. W., Weatherill, K. J., Lesanovsky, I., & Adams, C. S. (2021). Collectively Encoded Rydberg Qubit. Physical Review Letters, 127(6), Article 063604. https://doi.org/10.1103/PhysRevLett.127.063604

We demonstrate a collectively-encoded qubit based on a single Rydberg excitation stored in an ensemble of N entangled atoms. Qubit rotations are performed by applying microwave fields that drive excitations between Rydberg states. Coherent read-out i... Read More about Collectively Encoded Rydberg Qubit.

Collectively Encoded Rydberg Qubit (2021)
Journal Article
Spong, N. L. R., Jiao, Y., Hughes, O. D. W., Weatherill, K. J., Lesanovsky, I., & Adams, C. S. (2021). Collectively Encoded Rydberg Qubit. Physical Review Letters, 127(6), Article 063604. https://doi.org/10.1103/PhysRevLett.127.063604

We demonstrate a collectively encoded qubit based on a single Rydberg excitation stored in an ensemble of N entangled atoms. Qubit rotations are performed by applying microwave fields that drive excitations between Rydberg states. Coherent readout is... Read More about Collectively Encoded Rydberg Qubit.

Exponentially accelerated approach to stationarity in Markovian open quantum systems through the Mpemba effect (2021)
Journal Article
Carollo, F., Lasanta, A., & Lesanovsky, I. (2021). Exponentially accelerated approach to stationarity in Markovian open quantum systems through the Mpemba effect. Physical Review Letters, 127(6), Article 060401. https://doi.org/10.1103/PhysRevLett.127.060401

Ergodicity-breaking and slow relaxation are intriguing aspects of nonequilibrium dynamics both in classical and in quantum settings. These phenomena are typically associated with phase transitions, e.g. the emergence of metastable regimes near a firs... Read More about Exponentially accelerated approach to stationarity in Markovian open quantum systems through the Mpemba effect.

Theory of classical metastability in open quantum systems (2021)
Journal Article
Macieszczak, K., Rose, D. C., Lesanovsky, I., & Garrahan, J. P. (2021). Theory of classical metastability in open quantum systems. Physical Review Research, 3(3), 1-26. https://doi.org/10.1103/PhysRevResearch.3.033047

We present a general theory of classical metastability in open quantum systems. Metastability is a consequence of a large separation in timescales in the dynamics, leading to the existence of a regime when states of the system appear stationary, befo... Read More about Theory of classical metastability in open quantum systems.

Exploring the Many-Body Dynamics Near a Conical Intersection with Trapped Rydberg Ions (2021)
Journal Article
Gambetta, F. M., Zhang, C., Hennrich, M., Lesanovsky, I., & Li, W. (2021). Exploring the Many-Body Dynamics Near a Conical Intersection with Trapped Rydberg Ions. Physical Review Letters, 126(23), Article 233404. https://doi.org/10.1103/physrevlett.126.233404

Conical intersections between electronic potential energy surfaces are paradigmatic for the study of nonadiabatic processes in the excited states of large molecules. However, since the corresponding dynamics occurs on a femtosecond timescale, their i... Read More about Exploring the Many-Body Dynamics Near a Conical Intersection with Trapped Rydberg Ions.

Exactness of Mean-Field Equations for Open Dicke Models with an Application to Pattern Retrieval Dynamics (2021)
Journal Article
Carollo, F., & Lesanovsky, I. (2021). Exactness of Mean-Field Equations for Open Dicke Models with an Application to Pattern Retrieval Dynamics. Physical Review Letters, 126(23), Article 230601. https://doi.org/10.1103/physrevlett.126.230601

Open quantum Dicke models are paradigmatic systems for the investigation of light-matter interaction in out-of-equilibrium quantum settings. Albeit being structurally simple, these models can show intriguing physics. However, obtaining exact results... Read More about Exactness of Mean-Field Equations for Open Dicke Models with an Application to Pattern Retrieval Dynamics.

Machine learning time-local generators of open quantum dynamics (2021)
Journal Article
Mazza, P. P., Zietlow, D., Carollo, F., Andergassen, S., Martius, G., & Lesanovsky, I. (2021). Machine learning time-local generators of open quantum dynamics. Physical Review Research, 3(2), Article 023084. https://doi.org/10.1103/physrevresearch.3.023084

In the study of closed many-body quantum systems one is often interested in the evolution of a subset of degrees of freedom. On many occasions it is possible to approach the problem by performing an appropriate decomposition into a bath and a system.... Read More about Machine learning time-local generators of open quantum dynamics.

Measurement-feedback control of the chiral photon emission from an atom chain into a nanofiber (2021)
Journal Article
Buonaiuto, G., Lesanovsky, I., & Olmos, B. (2021). Measurement-feedback control of the chiral photon emission from an atom chain into a nanofiber. Journal of the Optical Society of America B, 38(5), 1470-1476. https://doi.org/10.1364/josab.422893

We theoretically investigate measurement-based feedback control of a laser-driven one-dimensional atomic chain interfaced with a nanofiber. The interfacing leads to all-to-all interactions among the atomic emitters and induces chirality, i.e. the dir... Read More about Measurement-feedback control of the chiral photon emission from an atom chain into a nanofiber.

Numerical simulation of quantum nonequilibrium phase transitions without finite-size effects (2021)
Journal Article
Gillman, E., Carollo, F., & Lesanovsky, I. (2021). Numerical simulation of quantum nonequilibrium phase transitions without finite-size effects. Physical Review A, 103(4), Article L040201. https://doi.org/10.1103/physreva.103.l040201

Classical (1 + 1)D cellular automata, as for instance Domany-Kinzel cellular automata, are paradigmatic systems for the study of non-equilibrium phenomena. Such systems evolve in discrete time-steps, and are thus free of time-discretisation errors. M... Read More about Numerical simulation of quantum nonequilibrium phase transitions without finite-size effects.

Emergent Bloch Oscillations in a Kinetically Constrained Rydberg Spin Lattice (2021)
Journal Article
Magoni, M., Mazza, P., & Lesanovsky, I. (2021). Emergent Bloch Oscillations in a Kinetically Constrained Rydberg Spin Lattice. Physical Review Letters, 126(10), Article 103002. https://doi.org/10.1103/physrevlett.126.103002

We explore the relaxation dynamics of elementary spin clusters in a kinetically constrained spin system. Inspired by experiments with Rydberg lattice gases, we focus on the situation in which an excited spin leads to a "facilitated" excitation of a n... Read More about Emergent Bloch Oscillations in a Kinetically Constrained Rydberg Spin Lattice.

Nonequilibrium Many-Body Quantum Engine Driven by Time-Translation Symmetry Breaking (2020)
Journal Article
Carollo, F., Brandner, K., & Lesanovsky, I. (2020). Nonequilibrium Many-Body Quantum Engine Driven by Time-Translation Symmetry Breaking. Physical Review Letters, 125(24), Article 240602. https://doi.org/10.1103/PhysRevLett.125.240602

Quantum many-body systems out of equilibrium can host intriguing phenomena such as transitions to exotic dynamical states. Although this emergent behaviour can be observed in experiments, its potential for technological applications is largely unexpl... Read More about Nonequilibrium Many-Body Quantum Engine Driven by Time-Translation Symmetry Breaking.

Interaction signatures and non-Gaussian photon states from a strongly driven atomic ensemble coupled to a nanophotonic waveguide (2020)
Journal Article
Olmos, B., Buonaiuto, G., Schneeweiss, P., & Lesanovsky, I. (2020). Interaction signatures and non-Gaussian photon states from a strongly driven atomic ensemble coupled to a nanophotonic waveguide. Physical Review A, 102(4), Article 043711. https://doi.org/10.1103/physreva.102.043711

We study theoretically a laser-driven one-dimensional chain of atoms interfaced with the guided optical modes of a nanophotonic waveguide. The period of the chain and the orientation of the laser field can be chosen such that emission occurs predomin... Read More about Interaction signatures and non-Gaussian photon states from a strongly driven atomic ensemble coupled to a nanophotonic waveguide.

Long-Range Multibody Interactions and Three-Body Antiblockade in a Trapped Rydberg Ion Chain (2020)
Journal Article
Gambetta, F. M., Zhang, C., Hennrich, M., Lesanovsky, I., & Li, W. (2020). Long-Range Multibody Interactions and Three-Body Antiblockade in a Trapped Rydberg Ion Chain. Physical Review Letters, 125(13), https://doi.org/10.1103/physrevlett.125.133602

Trapped Rydberg ions represent a flexible platform for quantum simulation and information processing which combines a high degree of control over electronic and vibrational degrees of freedom. The possibility to individually excite ions to high-lying... Read More about Long-Range Multibody Interactions and Three-Body Antiblockade in a Trapped Rydberg Ion Chain.

Nonequilibrium Phase Transitions in (1+1)-Dimensional Quantum Cellular Automata with Controllable Quantum Correlations (2020)
Journal Article
Gillman, E., Carollo, F., & Lesanovsky, I. (2020). Nonequilibrium Phase Transitions in (1+1)-Dimensional Quantum Cellular Automata with Controllable Quantum Correlations. Physical Review Letters, 125(10), Article 100403. https://doi.org/10.1103/physrevlett.125.100403

Motivated by recent progress in the experimental development of quantum simulators based on Rydberg atoms, we introduce and investigate the dynamics of a class of (1+1)-dimensional quantum cellular automata. These non-equilibrium many-body models, wh... Read More about Nonequilibrium Phase Transitions in (1+1)-Dimensional Quantum Cellular Automata with Controllable Quantum Correlations.

Signatures of Associative Memory Behavior in a Multimode Dicke Model (2020)
Journal Article
Fiorelli, E., Marcuzzi, M., Rotondo, P., Carollo, F., & Lesanovsky, I. (2020). Signatures of Associative Memory Behavior in a Multimode Dicke Model. Physical Review Letters, 125(7), https://doi.org/10.1103/physrevlett.125.070604

© 2020 American Physical Society. Dicke-like models can describe a variety of physical systems, such as atoms in a cavity or vibrating ion chains. In equilibrium these systems often feature a radical change in their behavior when switching from weak... Read More about Signatures of Associative Memory Behavior in a Multimode Dicke Model.

Vibrational dressing in kinetically constrained Rydberg spin systems (2020)
Journal Article
Mazza, P. P., Schmidt, R., & Lesanovsky, I. (2020). Vibrational dressing in kinetically constrained Rydberg spin systems. Physical Review Letters, 125(3), https://doi.org/10.1103/PhysRevLett.125.033602

Quantum spin systems with kinetic constraints have become paradigmatic for exploring collective dynamical behavior in many-body systems. Here we discuss a facilitated spin system which is inspired by recent progress in the realization of Rydberg quan... Read More about Vibrational dressing in kinetically constrained Rydberg spin systems.

Reaching the quantum Hall regime with rotating Rydberg-dressed atoms (2020)
Journal Article
Burrello, M., Lesanovsky, I., & Trombettoni, A. (2020). Reaching the quantum Hall regime with rotating Rydberg-dressed atoms. Physical Review Research, 2(2), Article 023290. https://doi.org/10.1103/physrevresearch.2.023290

Despite the striking progress in the field of quantum gases, one of their much anticipated applications—the simulation of quantum Hall states—remains elusive: all experimental approaches so far have failed in reaching a sufficiently small ratio betwe... Read More about Reaching the quantum Hall regime with rotating Rydberg-dressed atoms.

Nonequilibrium Quantum Many-Body Rydberg Atom Engine (2020)
Journal Article
Carollo, F., Gambetta, F. M., Brandner, K., Garrahan, J. P., & Lesanovsky, I. (2020). Nonequilibrium Quantum Many-Body Rydberg Atom Engine. Physical Review Letters, 124(17), https://doi.org/10.1103/physrevlett.124.170602

The standard approach to quantum engines is based on equilibrium systems and on thermo-dynamic transformations between Gibbs states. However, non-equilibrium quantum systems offer enhanced experimental flexibility in the control of their parameters a... Read More about Nonequilibrium Quantum Many-Body Rydberg Atom Engine.

Dissipative quantum state preparation and metastability in two-photon micromasers (2020)
Journal Article
Kouzelis, A., Macieszczak, K., Minář, J., & Lesanovsky, I. (2020). Dissipative quantum state preparation and metastability in two-photon micromasers. Physical Review A, 101(4), Article 043847. https://doi.org/10.1103/physreva.101.043847

We study the preparation of coherent quantum states in a two-photon micromaser for applications in quantum metrology. While this setting can be in principle realized in a host of physical systems, we consider atoms interacting with the field of a cav... Read More about Dissipative quantum state preparation and metastability in two-photon micromasers.

Submicrosecond entangling gate between trapped ions via Rydberg interaction (2020)
Journal Article
Zhang, C., Pokorny, F., Hennrich, M., Li, W., Lesanovsky, I., Higgins, G., & Pöschl, A. (2020). Submicrosecond entangling gate between trapped ions via Rydberg interaction. Nature, 580(7803), 345-349. https://doi.org/10.1038/s41586-020-2152-9

© 2020, The Author(s), under exclusive licence to Springer Nature Limited. Generating quantum entanglement in large systems on timescales much shorter than the coherence time is key to powerful quantum simulation and computation. Trapped ions are amo... Read More about Submicrosecond entangling gate between trapped ions via Rydberg interaction.

Collectively enhanced chiral photon emission from an atomic array near a nanofiber (2020)
Journal Article
Jones, R., Buonaiuto, G., Lang, B., Lesanovsky, I., & Olmos, B. (2020). Collectively enhanced chiral photon emission from an atomic array near a nanofiber. Physical Review Letters, 124(9), https://doi.org/10.1103/physrevlett.124.093601

Emitter ensembles interact collectively with the radiation field. In the case of a one-dimensional array of atoms near a nanofiber, this collective light-matter interaction does not only lead to an increased photon coupling to the guided modes within... Read More about Collectively enhanced chiral photon emission from an atomic array near a nanofiber.

Dynamics of strongly coupled disordered dissipative spin-boson systems (2020)
Journal Article
Fiorelli, E., Rotondo, P., Carollo, F., Marcuzzi, M., & Lesanovsky, I. (2020). Dynamics of strongly coupled disordered dissipative spin-boson systems. Physical Review Research, 2(1), https://doi.org/10.1103/physrevresearch.2.013198

Spin-boson Hamiltonians are an effective description for numerous quantum few-and many-body systems such as atoms coupled to cavity modes, quantum electrodynamics in circuits and trapped ion systems. While reaching the limit of strong coupling is pos... Read More about Dynamics of strongly coupled disordered dissipative spin-boson systems.

Controlling the dynamical scale factor in a trapped atom Sagnac interferometer (2020)
Journal Article
Zhou, Y., Lesanovsky, I., Fernholz, T., & Li, W. (2020). Controlling the dynamical scale factor in a trapped atom Sagnac interferometer. Physical Review A, 101(1), Article 012517. https://doi.org/10.1103/physreva.101.012517

Sagnac interferometers with massive particles promise unique advantages in achieving high-precision measurements of rotation rates over their optical counterparts. Recent proposals and experiments are exploring nonballistic Sagnac interferometers whe... Read More about Controlling the dynamical scale factor in a trapped atom Sagnac interferometer.

Engineering non-binary Rydberg interactions via electron-phonon coupling (2020)
Journal Article
Gambetta, F. M., Li, W., Schmidt-Kaler, F., & Lesanovsky, I. (2020). Engineering non-binary Rydberg interactions via electron-phonon coupling. Physical Review Letters, 124(4), https://doi.org/10.1103/PhysRevLett.124.043402

Coupling electronic and vibrational degrees of freedom of Rydberg atoms held in optical tweezers arrays offers a flexible mechanism for creating and controlling atom-atom interactions. We find that the state-dependent coupling between Rydberg atoms a... Read More about Engineering non-binary Rydberg interactions via electron-phonon coupling.

Engineering NonBinary Rydberg Interactions via Phonons in an Optical Lattice (2020)
Journal Article
Gambetta, F., Li, W., Schmidt-Kaler, F., & Lesanovsky, I. (2020). Engineering NonBinary Rydberg Interactions via Phonons in an Optical Lattice. Physical Review Letters, 124(4), Article 043402. https://doi.org/10.1103/physrevlett.124.043402

Coupling electronic and vibrational degrees of freedom of Rydberg atoms held in optical tweezer arrays offers a flexible mechanism for creating and controlling atom-atom interactions. We find that the state-dependent coupling between Rydberg atoms an... Read More about Engineering NonBinary Rydberg Interactions via Phonons in an Optical Lattice.

Classical stochastic discrete time crystals (2019)
Journal Article
Gambetta, F. M., Carollo, F., Lazarides, A., Lesanovsky, I., & Garrahan, J. P. (2019). Classical stochastic discrete time crystals. Physical Review E, 100(6), Article 060105(R). https://doi.org/10.1103/PhysRevE.100.060105

© 2019 American Physical Society. We describe a general and simple paradigm for discrete time crystals (DTCs), systems with a stable subharmonic response to an external driving field, in a classical thermal setting. We consider, specifically, an Isin... Read More about Classical stochastic discrete time crystals.

Dynamical creation and detection of entangled many-body states in a chiral atom chain (2019)
Journal Article
Buonaiuto, G., Jones, R., Olmos Sanchez, B., & Lesanovsky, I. (2019). Dynamical creation and detection of entangled many-body states in a chiral atom chain. New Journal of Physics, 21(11), https://doi.org/10.1088/1367-2630/ab4f50

Open quantum systems with chiral interactions can be realized by coupling atoms to guided radiation modes in photonic waveguides or optical fibres. In their steady state these systems can feature intricate many-body phases such as entangled dark stat... Read More about Dynamical creation and detection of entangled many-body states in a chiral atom chain.

Shuttling of Rydberg ions for fast entangling operations (2019)
Journal Article
VOGEL, J., LI, W., MOKHBERI, A., LESANOVSKY, I., & SCHMIDT-KALER, F. (2019). Shuttling of Rydberg ions for fast entangling operations. Physical Review Letters, 123(15), https://doi.org/10.1103/PhysRevLett.123.153603

We introduce a scheme to entangle Rydberg ions in a linear ion crystal, using the high electric polarizability of the Rydberg electronic states in combination with mutual Coulomb coupling of ions that establishes common modes of motion. After laser i... Read More about Shuttling of Rydberg ions for fast entangling operations.

Numerical Simulation of Critical Dissipative Non-Equilibrium Quantum Systems with an Absorbing State (2019)
Journal Article
Gillman, E., Carollo, F., & Lesanovsky, I. (2019). Numerical Simulation of Critical Dissipative Non-Equilibrium Quantum Systems with an Absorbing State. New Journal of Physics, 21, Article 093064. https://doi.org/10.1088/1367-2630/ab43b0

The simulation of out-of-equilibrium dissipative quantum many body systems is a problem of fundamental interest to a number of fields in physics, ranging from condensed matter to cosmology. For unitary systems, tensor network methods have proved succ... Read More about Numerical Simulation of Critical Dissipative Non-Equilibrium Quantum Systems with an Absorbing State.

Critical behavior of the quantum contact process in one dimension (2019)
Journal Article
Carollo, F., Gillman, E., Weimer, H., & Lesanovsky, I. (2019). Critical behavior of the quantum contact process in one dimension. Physical Review Letters, 123(10), https://doi.org/10.1103/PhysRevLett.123.100604

The contact process is a paradigmatic classical stochastic system displaying critical behavior even in one dimension. It features a non-equilibrium phase transition into an absorbing state that has been widely investigated and shown to belong to the... Read More about Critical behavior of the quantum contact process in one dimension.

Dressed dense atomic gases (2019)
Journal Article
Lesanovsky, I., Olmos, B., Guerin, W., & Kaiser, R. (2019). Dressed dense atomic gases. Physical Review A, 100(2), https://doi.org/10.1103/PhysRevA.100.021401

The interaction between atomic transition dipoles and photons leads to the formation of many-body states with collective dissipation and long-ranged interactions. Here, we put forward and explore a scenario in which a dense atomic gas — where the sep... Read More about Dressed dense atomic gases.

Exploring nonequilibrium phases of the generalized Dicke model with a trapped Rydberg-ion quantum simulator (2019)
Journal Article
Gambetta, F. M., Lesanovsky, I., & Li, W. (2019). Exploring nonequilibrium phases of the generalized Dicke model with a trapped Rydberg-ion quantum simulator. Physical Review A, 100(2), Article 022513. https://doi.org/10.1103/physreva.100.022513

Trapped ions are a versatile platform for the investigation of quantum many-body phenomena, in particular for the study of scenarios where long-range interactions are mediated by phonons. Recent experiments have shown that the trapped ion platform ca... Read More about Exploring nonequilibrium phases of the generalized Dicke model with a trapped Rydberg-ion quantum simulator.

Subradiance-protected excitation transport (2019)
Journal Article
Needham, J. A., Lesanovsky, I., & Olmos, B. (2019). Subradiance-protected excitation transport. New Journal of Physics, 21(7), Article 073061. https://doi.org/10.1088/1367-2630/ab31e8

We explore excitation transport within a one-dimensional chain of atoms where the atomic transition dipoles are coupled to the free radiation field. When the atoms are separated by distances smaller or comparable to the wavelength of the transition,... Read More about Subradiance-protected excitation transport.

Physical swap dynamics, shortcuts to relaxation, and entropy production in dissipative Rydberg gases (2019)
Journal Article
Gutiérrez, R., Garrahan, J. P., & Lesanovsky, I. (2019). Physical swap dynamics, shortcuts to relaxation, and entropy production in dissipative Rydberg gases. Physical Review E, 100(1), Article 012110. https://doi.org/10.1103/physreve.100.012110

Dense Rydberg gases are out-of-equilibrium systems where strong density-density interactions give rise to effective kinetic constraints. They cause dynamic arrest associated with highly constrained many-body configurations, leading to slow relaxation... Read More about Physical swap dynamics, shortcuts to relaxation, and entropy production in dissipative Rydberg gases.

Localization in spin chains with facilitation constraints and disordered interactions (2019)
Journal Article
Ostmann, M., Marcuzzi, M., Garrahan, J. P., & Lesanovsky, I. (2019). Localization in spin chains with facilitation constraints and disordered interactions. Physical Review A, 99(6), 1-7. https://doi.org/10.1103/PhysRevA.99.060101

Quantum many-body systems with kinetic constraints exhibit intriguing relaxation dynamics. Recent experimental progress in the field of cold atomic gases offers a handle for probing collective behavior of such systems, in particular for understanding... Read More about Localization in spin chains with facilitation constraints and disordered interactions.

Coherence, entanglement, and quantumness in closed and open systems with conserved charge, with an application to many-body localization (2019)
Journal Article
Macieszczak, K., Levi, E., Macrì, T., Lesanovsky, I., & Garrahan, J. P. (2019). Coherence, entanglement, and quantumness in closed and open systems with conserved charge, with an application to many-body localization. Physical Review A, 99(5), Article 052354. https://doi.org/10.1103/physreva.99.052354

While the scaling of entanglement in a quantum system can be used to distinguish many-body quantum phases, it is usually hard to quantify the amount of entanglement in mixed states of open quantum systems, while measuring entanglement experimentally,... Read More about Coherence, entanglement, and quantumness in closed and open systems with conserved charge, with an application to many-body localization.

Quantum accelerated approach to the thermal state of classical all-to-all connected spin systems with applications to pattern retrieval in the Hopfield neural network (2019)
Journal Article
Fiorelli, E., Rotondo, P., Marcuzzi, M., Garrahan, J. P., & Lesanovsky, I. (2019). Quantum accelerated approach to the thermal state of classical all-to-all connected spin systems with applications to pattern retrieval in the Hopfield neural network. Physical Review A, 99(3), Article 032126. https://doi.org/10.1103/physreva.99.032126

We explore the question as to whether quantum effects can yield a speedup of the nonequilibrium evolution of fully connected quadratic spin models towards a classical thermal state. In our approach we exploit the fact that the thermal state of a spin... Read More about Quantum accelerated approach to the thermal state of classical all-to-all connected spin systems with applications to pattern retrieval in the Hopfield neural network.

Synthetic lattices, flat bands and localization in Rydberg quantum simulators (2019)
Journal Article
Ostmann, M., Marcuzzi, M., Minář, J., & Lesanovsky, I. (2019). Synthetic lattices, flat bands and localization in Rydberg quantum simulators. Quantum Science and Technology, 4(2), 1-8. https://doi.org/10.1088/2058-9565/aaf29d

© 2019 IOP Publishing Ltd. The most recent manifestation of cold Rydberg atom quantum simulators that employs tailored optical tweezer arrays enables the study of many-body dynamics under so-called facilitation conditions. We show how the facilitatio... Read More about Synthetic lattices, flat bands and localization in Rydberg quantum simulators.

Discrete time crystals in the absence of manifest symmetries or disorder in open quantum systems (2019)
Journal Article
Gambetta, F., Carollo, F., Marcuzzi, M., Garrahan, J., & Lesanovsky, I. (2019). Discrete time crystals in the absence of manifest symmetries or disorder in open quantum systems. Physical Review Letters, 122(1), Article 015701. https://doi.org/10.1103/physrevlett.122.015701

We establish a link between metastability and a discrete time-crystalline phase in a periodically driven open quantum system. The mechanism we highlight requires neither the system to display any microscopic symmetry nor the presence of disorder, but... Read More about Discrete time crystals in the absence of manifest symmetries or disorder in open quantum systems.

Non-equilibrium absorbing state phase transitions in discrete-time quantum cellular automaton dynamics on spin lattices (2018)
Journal Article
Lesanovsky, I., Macieszczak, K., & Garrahan, J. P. (2018). Non-equilibrium absorbing state phase transitions in discrete-time quantum cellular automaton dynamics on spin lattices. Quantum Science and Technology, 4(2), https://doi.org/10.1088/2058-9565/aaf831

We introduce a discrete-time quantum dynamics on a two-dimensional lattice that describes the evolution of a $1+1$-dimensional spin system. The underlying quantum map is constructed such that the reduced state at each time step is separable. We show... Read More about Non-equilibrium absorbing state phase transitions in discrete-time quantum cellular automaton dynamics on spin lattices.

Singularities in large deviations of work in quantum quenches (2018)
Journal Article
Rotondo, P., Minář, J., Garrahan, J. P., Lesanovsky, I., & Marcuzzi, M. (2018). Singularities in large deviations of work in quantum quenches. Physical Review B, 98(18), Article 184303. https://doi.org/10.1103/physrevb.98.184303

We investigate large deviations of the work performed in a quantum quench across two different phases separated by a quantum critical point, using as an example the Dicke model quenched from its superradiant to its normal phase. We extract the distri... Read More about Singularities in large deviations of work in quantum quenches.

Current fluctuations in boundary-driven quantum spin chains (2018)
Journal Article
Carollo, F., Garrahan, J. P., & Lesanovsky, I. (2018). Current fluctuations in boundary-driven quantum spin chains. Physical Review B, 98(9), 1-9. https://doi.org/10.1103/physrevb.98.094301

Boundary-driven quantum spin chains are paradigmatic nonequilibrium systems featuring the presence of particle currents. In general, it may not be possible to distinguish an incoherent type of particle transport from a truly quantum coherent one thro... Read More about Current fluctuations in boundary-driven quantum spin chains.

A terahertz-driven non-equilibrium phase transition in a room temperature atomic vapour (2018)
Journal Article
Wade, C., Marcuzzi, M., Levi, E., Kondo, J., Lesanovsky, I., Adams, C., & Weatherill, K. (2018). A terahertz-driven non-equilibrium phase transition in a room temperature atomic vapour. Nature Communications, 9, 1-7. https://doi.org/10.1038/s41467-018-05597-4

There are few demonstrated examples of phase transitions that may be driven directly by terahertz frequency electric fields, and those that are known require field strengths exceeding 1 MV cm?1. Here we report a non-equilibrium phase transition drive... Read More about A terahertz-driven non-equilibrium phase transition in a room temperature atomic vapour.

Glassy dynamics due to a trajectory phase transition in dissipative Rydberg gases (2018)
Journal Article
Pérez-Espigares, C., Lesanovsky, I., Garrahan, J. P., & Gutiérrez, R. (2018). Glassy dynamics due to a trajectory phase transition in dissipative Rydberg gases. Physical Review A, 98(2), https://doi.org/10.1103/physreva.98.021804

The physics of highly excited Rydberg atoms is governed by blockade or exclusion interactions that hinder the excitation of atoms in the proximity of a previously excited one. This leads to cooperative effects and a relaxation dynamics displaying spa... Read More about Glassy dynamics due to a trajectory phase transition in dissipative Rydberg gases.

Spectral properties of simple classical and quantum reset processes (2018)
Journal Article
Rose, D. C., Touchette, H., Lesanovsky, I., & Garrahan, J. P. (2018). Spectral properties of simple classical and quantum reset processes. Physical Review E, 98(2), doi:10.1103/physreve.98.022129. ISSN 2470-0045

Substrate-induced shifts and screening in the fluorescence spectra of supramolecular adsorbed organic monolayers (2018)
Journal Article
Kerfoot, J., Korolkov, V. V., Nizovtsev, A. S., Jones, R., Taniguchi, T., Watanabe, K., …Beton, P. H. (2018). Substrate-induced shifts and screening in the fluorescence spectra of supramolecular adsorbed organic monolayers. Journal of Chemical Physics, 149(5), Article 054701. https://doi.org/10.1063/1.5041418

We have investigated the influence of the substrate on the fluorescence of adsorbed organic molecules. Monolayer films of perylene-3,4,9,10-tetracarboxylic-3,4,9,10-diimide (PTCDI), a supramolecular network formed from PTCDI and melamine, and perylen... Read More about Substrate-induced shifts and screening in the fluorescence spectra of supramolecular adsorbed organic monolayers.

Making rare events typical in Markovian open quantum systems (2018)
Journal Article
Carollo, F., Garrahan, J. P., Lesanovsky, I., & Pérez-Espigares, C. (2018). Making rare events typical in Markovian open quantum systems. Physical Review A, 98(1), Article 010103. https://doi.org/10.1103/physreva.98.010103

Large dynamical fluctuations—atypical realizations of the dynamics sustained over long periods of time—can play a fundamental role in determining the properties of collective behavior of both classical and quantum nonequilibrium systems. Rare dynamic... Read More about Making rare events typical in Markovian open quantum systems.

Dissipative many-body physics of cold Rydberg atoms (2018)
Journal Article
Morsch, O., & Lesanovsky, I. (2018). Dissipative many-body physics of cold Rydberg atoms. Rivista del Nuovo Cimento, 41(7), 383-414. https://doi.org/10.1393/ncr/i2018-10149-7

In the last twenty years, Rydberg atoms have become a versatile and much studied system for implementing quantum many-body systems in the framework of quantum computation and quantum simulation. However, even in the absence of coherent evolution Ryd... Read More about Dissipative many-body physics of cold Rydberg atoms.

Modified dipole-dipole interaction and dissipation in an atomic ensemble near surfaces (2018)
Journal Article
Jones, R., Needham, J. A., Lesanovsky, I., Intravaia, F., & Olmos, B. (2018). Modified dipole-dipole interaction and dissipation in an atomic ensemble near surfaces. Physical Review A, 97(5), Article 053841. https://doi.org/10.1103/PhysRevA.97.053841

We study how the radiative properties of a dense ensemble of atoms can be modified when they are placed near or between metallic or dielectric surfaces. If the average separation between the atoms is comparable or smaller than the wavelength of the s... Read More about Modified dipole-dipole interaction and dissipation in an atomic ensemble near surfaces.

Many-body kinetics of dynamic nuclear polarization by the cross effect (2018)
Journal Article
Karabanov, A., Wiśniewski, D., Raimondi, F., Lesanovsky, I., & Köckenberger, W. (in press). Many-body kinetics of dynamic nuclear polarization by the cross effect. Physical Review A, 97(3), https://doi.org/10.1103/PhysRevA.97.031404

Dynamic nuclear polarization (DNP) is an out-of-equilibrium method for generating nonthermal spin polarization which provides large signal enhancements in modern diagnostic methods based on nuclear magnetic resonance. A particular instance is cross-e... Read More about Many-body kinetics of dynamic nuclear polarization by the cross effect.

Open quantum generalisation of Hopfield neural networks (2018)
Journal Article
Rotondo, P., Marcuzzi, M., Garrahan, J. P., Lesanovsky, I., & Müller, M. (2018). Open quantum generalisation of Hopfield neural networks. Journal of Physics A: Mathematical and Theoretical, 51(11), Article 115301. https://doi.org/10.1088/1751-8121/aaabcb

We propose a new framework to understand how quantum effects may impact on the dynamics of neural networks. We implement the dynamics of neural networks in terms of Markovian open quantum systems, which allows us to treat thermal and quantum coherent... Read More about Open quantum generalisation of Hopfield neural networks.

Devil's staircases without particle-hole symmetry (2018)
Journal Article
Lan, Z., Lesanovsky, I., & Li, W. (2018). Devil's staircases without particle-hole symmetry. Physical Review B, 97, https://doi.org/10.1103/PhysRevB.97.075117

We present and analyze spin models with long-range interactions whose ground state features a so-called devil’s staircase and where plateaus of the staircase are accessed by varying two-body interactions. This is in contrast to the canonical devil’s... Read More about Devil's staircases without particle-hole symmetry.

Quench dynamics of a dissipative Rydberg gas in the classical and quantum regimes (2018)
Journal Article
Gribben, D., Lesanovsky, I., & Gutierrez, R. (in press). Quench dynamics of a dissipative Rydberg gas in the classical and quantum regimes. Physical Review A, 97(1), https://doi.org/10.1103/PhysRevA.97.011603

Understanding the non-equilibrium behavior of quantum systems is a major goal of contemporary physics. Much research is currently focused on the dynamics of many-body systems in lowdimensional lattices following a quench, i.e., a sudden change of par... Read More about Quench dynamics of a dissipative Rydberg gas in the classical and quantum regimes.

Non-adiabatic quantum state preparation and quantum state transport in chains of Rydberg atoms (2017)
Journal Article
Ostmann, M., Minář, J., Marcuzzi, M., Levi, E., & Lesanovsky, I. (2017). Non-adiabatic quantum state preparation and quantum state transport in chains of Rydberg atoms. New Journal of Physics, 19(12), https://doi.org/10.1088/1367-2630/aa983e

Motivated by recent progress in the experimental manipulation of cold atoms in optical lattices, we study three different protocols for non-adiabatic quantum state preparation and state transport in chains of Rydberg atoms. The protocols we discuss a... Read More about Non-adiabatic quantum state preparation and quantum state transport in chains of Rydberg atoms.

Fluctuating hydrodynamics, current fluctuations and hyperuniformity in boundary-driven open quantum chains (2017)
Journal Article
Carollo, F., Garrahan, J. P., Lesanovsky, I., & Pérez-Espigares, C. (2017). Fluctuating hydrodynamics, current fluctuations and hyperuniformity in boundary-driven open quantum chains. Physical Review E, 96(5), Article 052118. https://doi.org/10.1103/PhysRevE.96.052118

We consider a class of either fermionic or bosonic non-interacting open quantum chains driven by dissipative interactions at the boundaries and study the interplay of coherent transport and dissipative processes, such as bulk dephasing and diffusion.... Read More about Fluctuating hydrodynamics, current fluctuations and hyperuniformity in boundary-driven open quantum chains.

Metastable decoherence-free subspaces and electromagnetically induced transparency in interacting many-body systems (2017)
Journal Article
Macieszczak, K., Zhou, Y., Hofferberth, S., Garrahan, J. P., Li, W., & Lesanovsky, I. (2017). Metastable decoherence-free subspaces and electromagnetically induced transparency in interacting many-body systems. Physical Review A, 96(4), Article 043860. https://doi.org/10.1103/PhysRevA.96.043860

We investigate the dynamics of a generic interacting many-body system under conditions of electromagnetically induced transparency (EIT). This problem is of current relevance due to its connection to non-linear optical media realized by Rydberg atoms... Read More about Metastable decoherence-free subspaces and electromagnetically induced transparency in interacting many-body systems.

Phase transitions in electron spin resonance under continuous microwave driving (2017)
Journal Article
Karabanov, A., Rose, D. C., Köckenberger, W., Garrahan, J. P., & Lesanovsky, I. (in press). Phase transitions in electron spin resonance under continuous microwave driving. Physical Review Letters, 119, https://doi.org/10.1103/PhysRevLett.119.150402

We study an ensemble of strongly coupled electrons under continuous microwave irradiation interacting with a dissipative environment, a problem of relevance to the creation of highly polarized non-equilibrium states in nuclear magnetic resonance. We... Read More about Phase transitions in electron spin resonance under continuous microwave driving.

Topological properties of a dense atomic lattice gas (2017)
Journal Article
Bettles, R. J., Minář, J., Adams, C. S., Lesanovsky, I., & Olmos, B. (2017). Topological properties of a dense atomic lattice gas. Physical Review A, 96(4), Article 041603. https://doi.org/10.1103/PhysRevA.96.041603

We investigate the existence of topological phases in a dense two-dimensional atomic lattice gas. The coupling of the atoms to the radiation field gives rise to dissipation and a non-trivial coherent long-range exchange interaction whose form goes be... Read More about Topological properties of a dense atomic lattice gas.

Experimental signatures of an absorbing-state phase transition in an open driven many-body quantum system (2017)
Journal Article
Gutiérrez, R., Simonelli, C., Archimi, M., Castellucci, F., Arimondo, E., Ciampini, D., …Morsch, O. (2017). Experimental signatures of an absorbing-state phase transition in an open driven many-body quantum system. Physical Review A, 96(4), Article 041602(R). https://doi.org/10.1103/PhysRevA.96.041602

Understanding and probing phase transitions in non-equilibrium systems is an ongoing challenge in physics. A particular instance are phase transitions that occur between a non-fluctuating absorbing phase, e.g., an extinct population, and one in which... Read More about Experimental signatures of an absorbing-state phase transition in an open driven many-body quantum system.

Epidemic dynamics in open quantum spin systems (2017)
Journal Article
Perez-Espigares, C., Marcuzzi, M., Gutierrez, R., & Lesanovsky, I. (2017). Epidemic dynamics in open quantum spin systems. Physical Review Letters, 119(14), 1-6. https://doi.org/10.1103/PhysRevLett.119.140401

We explore the non-equilibrium evolution and stationary states of an open many-body system which displays epidemic spreading dynamics in a classical and a quantum regime. Our study is motivated by recent experiments conducted in strongly interacting... Read More about Epidemic dynamics in open quantum spin systems.

Effective spin physics in two-dimensional cavity QED arrays (2017)
Journal Article
Minář, J., Söyler, Ş. G., Rotondo, P., & Lesanovsky, I. (2017). Effective spin physics in two-dimensional cavity QED arrays. New Journal of Physics, 19, https://doi.org/10.1088/1367-2630/aa753c

We investigate a strongly correlated system of light and matter in two-dimensional cavity arrays. We formulate a multimode Tavis–Cummings (TC) Hamiltonian for two-level atoms coupled to cavity modes and driven by an external laser field which reduces... Read More about Effective spin physics in two-dimensional cavity QED arrays.

Single strontium Rydberg ion confined in a Paul trap (2017)
Journal Article
Higgins, G., Li, W., Pokorny, F., Zhang, C., Kress, F., Maier, C., …Hennrich, M. (2017). Single strontium Rydberg ion confined in a Paul trap. Physical Review X, 7(2), Article 021038. https://doi.org/10.1103/PhysRevX.7.021038

Trapped Rydberg ions are a promising new system for quantum information processing. They have the potential to join the precise quantum operations of trapped ions and the strong, long-range interactions between Rydberg atoms. Combining the two system... Read More about Single strontium Rydberg ion confined in a Paul trap.

Facilitation dynamics and localization phenomena in Rydberg lattice gases with position disorder (2017)
Journal Article
Marcuzzi, M., Minář, J., Barredo, D., Léséleuc, S. D., Labuhn, H., Lahaye, T., …Lesanovsky, I. (2017). Facilitation dynamics and localization phenomena in Rydberg lattice gases with position disorder. Physical Review Letters, 118(6-10), Article 063606. https://doi.org/10.1103/PhysRevLett.118.063606

We explore the dynamics of Rydberg excitations in an optical tweezer array under anti-blockade (or facilitation) conditions. Due to the finite temperature the atomic positions are randomly spread, an effect that leads to quenched correlated disorder... Read More about Facilitation dynamics and localization phenomena in Rydberg lattice gases with position disorder.

Nonequilibrium effective field theory for absorbing state phase transitions in driven open quantum spin systems (2017)
Journal Article
Buchhold, M., Everest, B., Marcuzzi, M., Lesanovsky, I., & Diehl, S. (2017). Nonequilibrium effective field theory for absorbing state phase transitions in driven open quantum spin systems. Physical Review B, 95, https://doi.org/10.1103/PhysRevB.95.014308

Phase transitions to absorbing states are among the simplest examples of critical phenomena out of equilibrium. The characteristic feature of these models is the presence of a fluctuationless configuration which the dynamics cannot leave, which has p... Read More about Nonequilibrium effective field theory for absorbing state phase transitions in driven open quantum spin systems.

Role of interactions in a dissipative many-body localized system (2017)
Journal Article
Everest, B., Lesanovsky, I., Garrahan, J. P., & Levi, E. (2017). Role of interactions in a dissipative many-body localized system. Physical Review B, 95(2), https://doi.org/10.1103/PhysRevB.95.024310

Recent experimental and theoretical efforts have focused on the effect of dissipation on quantum many-body systems in their many-body localized (MBL) phase. While in the presence of dephasing noise such systems reach a unique ergodic state, their dyn... Read More about Role of interactions in a dissipative many-body localized system.

Metastability in an open quantum Ising model (2016)
Journal Article
Rose, D. C., Macieszczak, K., Lesanovsky, I., & Garrahan, J. P. (2016). Metastability in an open quantum Ising model. Physical Review E, 94(5), Article 052132. https://doi.org/10.1103/PhysRevE.94.052132

We apply a recently developed theory for metastability in open quantum systems to a one-dimensional dissipative quantum Ising model. Earlier results suggest this model features either a nonequilibrium phase transition or a smooth but sharp crossover,... Read More about Metastability in an open quantum Ising model.

Quantum melting of two-component Rydberg crystals (2016)
Journal Article
Lan, Z., Li, W., & Lesanovsky, I. (2016). Quantum melting of two-component Rydberg crystals. Physical Review A, 94(5), Article 051603. https://doi.org/10.1103/PhysRevA.94.051603

We investigate the quantum melting of one-dimensional crystals that are realized in an atomic lattice in which ground state atoms are laser excited to two Rydberg states. We focus on a regime where both, intra- and interstate density-density interact... Read More about Quantum melting of two-component Rydberg crystals.

Emergent kinetic constraints, ergodicity breaking, and cooperative dynamics in noisy quantum systems (2016)
Journal Article
Everest, B., Marcuzzi, M., Garrahan, J. P., & Lesanovsky, I. (2016). Emergent kinetic constraints, ergodicity breaking, and cooperative dynamics in noisy quantum systems. Physical Review E, 94(5), Article 052108. https://doi.org/10.1103/physreve.94.052108

Kinetically constrained spin systems play an important role in understanding key properties of the dynamics of slowly relaxing materials, such as glasses. Recent experimental studies have revealed that manifest kinetic constraints govern the evolutio... Read More about Emergent kinetic constraints, ergodicity breaking, and cooperative dynamics in noisy quantum systems.

Superfluid flow past an obstacle in annular Bose-Einstein condensates (2016)
Journal Article
Syafwan, M., Kevrekidis, P., Paris-Mandoki, A., Lesanovsky, I., Kruger, P., Hackermuller, L., & Susanto, H. (2016). Superfluid flow past an obstacle in annular Bose-Einstein condensates. Journal of Physics B: Atomic, Molecular and Optical Physics, 49(23), 1-8. https://doi.org/10.1088/0953-4075/49/23/235301

© 2016 IOP Publishing Ltd. We investigate the flow of a one-dimensional nonlinear Schrödinger model with periodic boundary conditions past an obstacle, motivated by recent experiments with Bose-Einstein condensates in ring traps. Above certain rotati... Read More about Superfluid flow past an obstacle in annular Bose-Einstein condensates.

Dynamic nuclear polarisation by thermal mixing: quantum theory and macroscopic simulations (2016)
Journal Article
Karabanov, A., Kwiatkowski, G., Perotto, C. U., Wiśniewski, D., McMaster, J., Lesanovsky, I., & Köckenberger, W. (2016). Dynamic nuclear polarisation by thermal mixing: quantum theory and macroscopic simulations. Physical Chemistry Chemical Physics, 18(43), 30093-30104. https://doi.org/10.1039/c6cp04345c

A theory of dynamic nuclear polarisation (DNP) by thermal mixing is suggested based on purely quantum considerations. A minimal 6-level microscopic model is developed to test the theory and link it to the well known thermodynamic model. Optimal condi... Read More about Dynamic nuclear polarisation by thermal mixing: quantum theory and macroscopic simulations.

Prospects of charged-oscillator quantum-state generation with Rydberg atoms (2016)
Journal Article
Stevenson, R., Minář, J., Hofferberth, S., & Lesanovsky, I. (2016). Prospects of charged-oscillator quantum-state generation with Rydberg atoms. Physical Review A, 94, Article 043813. https://doi.org/10.1103/PhysRevA.94.043813

We explore the possibility of engineering quantum states of a charged mechanical oscillator by coupling it to a stream of atoms in superpositions of high-lying Rydberg states. Our scheme relies on the driving of a two-phonon resonance within the osci... Read More about Prospects of charged-oscillator quantum-state generation with Rydberg atoms.

Non-equilibrium fluctuations and metastability arising from non-additive interactions in dissipative multi-component Rydberg gases (2016)
Journal Article
Gutierrez, R., Garrahan, J. P., & Lesanovsky, I. (2016). Non-equilibrium fluctuations and metastability arising from non-additive interactions in dissipative multi-component Rydberg gases. New Journal of Physics, 18, https://doi.org/10.1088/1367-2630/18/9/093054

We study the out-of-equilibrium dynamics of dissipative gases of atoms excited to two or more high-lying Rydberg states. This situation bears interesting similarities to classical binary (in general p-ary) mixtures of particles. The effective forces... Read More about Non-equilibrium fluctuations and metastability arising from non-additive interactions in dissipative multi-component Rydberg gases.

Quantum non-equilibrium dynamics of Rydberg gases in the presence of dephasing noise of different strengths (2016)
Journal Article
Levi, E., Gutierrez, R., & Lesanovsky, I. (2016). Quantum non-equilibrium dynamics of Rydberg gases in the presence of dephasing noise of different strengths. Journal of Physics B: Atomic, Molecular and Optical Physics, 49(18), Article 184003. https://doi.org/10.1088/0953-4075/49/18/184003

In the presence of strong dephasing noise the dynamics of Rydberg gases becomes effectively classical, due to the rapid decay of quantum superpositions between atomic levels. Recently a great deal of attention has been devoted to the stochastic dynam... Read More about Quantum non-equilibrium dynamics of Rydberg gases in the presence of dephasing noise of different strengths.

Enhancement of Rydberg-mediated single-photon nonlinearities by electrically tuned Förster resonances (2016)
Journal Article
Gorniaczyk, H., Tresp, C., Bienias, P., Paris-Mandoki, A., Li, W., Mirgorodskiy, I., …Hofferberth, S. (2016). Enhancement of Rydberg-mediated single-photon nonlinearities by electrically tuned Förster resonances. Nature Communications, 7, Article e12480. https://doi.org/10.1038/ncomms12480

We demonstrate experimentally that Stark-tuned Förster resonances can be used to substantially increase the interaction between individual photons mediated by Rydberg interaction inside an optical medium. This technique is employed to boost the gain... Read More about Enhancement of Rydberg-mediated single-photon nonlinearities by electrically tuned Förster resonances.

Absorbing state phase transition with competing quantum and classical fluctuations (2016)
Journal Article
Marcuzzi, M., Buchhold, M., Diehl, S., & Lesanovsky, I. (2016). Absorbing state phase transition with competing quantum and classical fluctuations. Physical Review Letters, 116(24), https://doi.org/10.1103/PhysRevLett.116.245701

Stochastic processes with absorbing states feature examples of non-equilibrium universal phenomena. While the classical regime has been thoroughly investigated in the past, relatively little is known about the behavior of these non-equilibrium system... Read More about Absorbing state phase transition with competing quantum and classical fluctuations.

Towards a Theory of Metastability in Open Quantum Dynamics (2016)
Journal Article
Macieszczak, K., Guţă, M., Lesanovsky, I., & Garrahan, J. P. (2016). Towards a Theory of Metastability in Open Quantum Dynamics. Physical Review Letters, 116(24), Article 240404. https://doi.org/10.1103/PhysRevLett.116.240404

© 2016 American Physical Society. By generalizing concepts from classical stochastic dynamics, we establish the basis for a theory of metastability in Markovian open quantum systems. Partial relaxation into long-lived metastable states - distinct fro... Read More about Towards a Theory of Metastability in Open Quantum Dynamics.

Robustness of many-body localization in the presence of dissipation (2016)
Journal Article
Levi, E., Heyl, M., Lesanovsky, I., & Garrahan, J. P. (2016). Robustness of many-body localization in the presence of dissipation. Physical Review Letters, 116, Article 237203. https://doi.org/10.1103/PhysRevLett.116.237203

Many-body localization (MBL) has emerged as a novel paradigm for robust ergodicity breaking in closed quantum many-body systems. However, it is not yet clear to which extent MBL survives in the presence of dissipative processes induced by the couplin... Read More about Robustness of many-body localization in the presence of dissipation.

Non-equilibrium dynamics of non-linear Jaynes-Cummings model in cavity arrays (2016)
Journal Article
Minář, J., Söyler, Ş. G., & Lesanovsky, I. (2016). Non-equilibrium dynamics of non-linear Jaynes-Cummings model in cavity arrays. New Journal of Physics, 18(5), 1-16. https://doi.org/10.1088/1367-2630/18/5/053035

We analyze in detail an open cavity array using mean-field description, where each cavity field is coupled to a number of three-level atoms. Such system is highly tunable and can be described by a Jaynes-Cummings like Hamiltonian with additional non-... Read More about Non-equilibrium dynamics of non-linear Jaynes-Cummings model in cavity arrays.

Towards rotation sensing with a single atomic clock (2016)
Journal Article
Fernholz, T., Stevenson, R., Hush, M. R., Lesanovsky, I., Bishop, T., Gentile, F., …von Klitzing, W. (2016). Towards rotation sensing with a single atomic clock. Proceedings of SPIE, 9900(990007), https://doi.org/10.1117/12.2229878

We discuss a scheme to implement a gyroscopic atom sensor with magnetically trapped ultra-cold atoms. Unlike standard light or matter wave Sagnac interferometers no free wave propagation is used. Interferometer operation is controlled only with stati... Read More about Towards rotation sensing with a single atomic clock.

Experimental observation of controllable kinetic constraints in a cold atomic gas (2016)
Journal Article
Valado, M., Simonelli, C., Hoogerland, M., Lesanovsky, I., Garrahan, J. P., Arimondo, E., …Morsch, O. (2016). Experimental observation of controllable kinetic constraints in a cold atomic gas. Physical Review A, 93(4), Article 040701. https://doi.org/10.1103/PhysRevA.93.040701

Many-body systems relaxing to equilibrium can exhibit complex dynamics even if their steady state is trivial. In situations where relaxation requires highly constrained local particle rearrangements, such as in glassy systems, this dynamics can be di... Read More about Experimental observation of controllable kinetic constraints in a cold atomic gas.

Solid effect DNP polarization dynamics in a system of many spins (2016)
Journal Article
Wiśniewski, D., Karabanov, A., Lesanovsky, I., & Köckenberger, W. (2016). Solid effect DNP polarization dynamics in a system of many spins. Journal of Magnetic Resonance, 264, 30-38. https://doi.org/10.1016/j.jmr.2016.01.016

We discuss the polarization dynamics during solid effect dynamic nuclear polarization (DNP) in a central spin model that consists of an electron surrounded by many nuclei. To this end we use a recently developed formalism and validate first its perfo... Read More about Solid effect DNP polarization dynamics in a system of many spins.

Dynamical phase transitions as a resource for quantum enhanced metrology (2016)
Journal Article
Macieszczak, K., Gu??, M., Lesanovsky, I., & Garrahan, J. P. (2016). Dynamical phase transitions as a resource for quantum enhanced metrology. Physical Review A, 93(2), Article 022103. https://doi.org/10.1103/PhysRevA.93.022103

We consider the general problem of estimating an unknown control parameter of an open quantum system. We establish a direct relation between the evolution of both system and environment and the precision with which the parameter can be estimated. We... Read More about Dynamical phase transitions as a resource for quantum enhanced metrology.

Self-similar non-equilibrium dynamics of a many-body system with power-law interactions (2015)
Journal Article
Gutierrez, R., Garrahan, J. P., & Lesanovsky, I. (2015). Self-similar non-equilibrium dynamics of a many-body system with power-law interactions. Physical Review E, 92(6), Article e062144. https://doi.org/10.1103/PhysRevE.92.062144

The influence of power-law interactions on the dynamics of many-body systems far from equilibrium is much less explored than their effect on static and thermodynamic properties. To gain insight into this problem we introduce and analyze here an out-o... Read More about Self-similar non-equilibrium dynamics of a many-body system with power-law interactions.

Emergent devil's staircase without particle-hole symmetry in Rydberg quantum gases with competing attractive and repulsive interactions (2015)
Journal Article
Lan, Z., Minář, J., Levi, E., Li, W., & Lesanovsky, I. (2015). Emergent devil's staircase without particle-hole symmetry in Rydberg quantum gases with competing attractive and repulsive interactions. Physical Review Letters, 115, Article 203001. https://doi.org/10.1103/PhysRevLett.115.203001

The devil's staircase is a fractal structure that characterizes the ground state of one-dimensional classical lattice gases with long-range repulsive convex interactions. Its plateaus mark regions of stability for specific filling fractions which are... Read More about Emergent devil's staircase without particle-hole symmetry in Rydberg quantum gases with competing attractive and repulsive interactions.

Coherence in a cold atom photon transistor (2015)
Journal Article
Li, W., & Lesanovsky, I. (2015). Coherence in a cold atom photon transistor. Physical Review A, 92(4), Article 043828. https://doi.org/10.1103/PhysRevA.92.043828

Recent experiments have realized an all-optical photon transistor using a cold atomic gas. This approach relies on electromagnetically induced transparency (EIT) in conjunction with the strong interaction among atoms excited to high-lying Rydberg sta... Read More about Coherence in a cold atom photon transistor.

Sagnac Interferometry with a Single Atomic Clock (2015)
Journal Article
Stevenson, R., Hush, M. R., Bishop, T., Lesanovsky, I., & Fernholz, T. (2015). Sagnac Interferometry with a Single Atomic Clock. Physical Review Letters, 115(16), Article 163001. https://doi.org/10.1103/PhysRevLett.115.163001

© 2015 American Physical Society. © 2015 American Physical Society. The Sagnac effect enables interferometric measurements of rotation with high precision. Using matter waves instead of light promises resolution enhancement by orders of magnitude tha... Read More about Sagnac Interferometry with a Single Atomic Clock.

Non-equilibrium universality in the dynamics of dissipative cold atomic gases (2015)
Journal Article
Marcuzzi, M., Levi, E., Li, W., Garrahan, J. P., Olmos, B., & Lesanovsky, I. (2015). Non-equilibrium universality in the dynamics of dissipative cold atomic gases. New Journal of Physics, 17(July), Article 72003. https://doi.org/10.1088/1367-2630/17/7/072003

The theory of continuous phase transitions predicts the universal collective properties of a physical system near a critical point, which for instance manifest in characteristic power-law behaviours of physical observables. The well-established conce... Read More about Non-equilibrium universality in the dynamics of dissipative cold atomic gases.

Dynamic Nuclear Polarization as Kinetically Constrained Diffusion (2015)
Journal Article
Köckenberger, W., Wiśniewski, D., Karabanov, A., Wiśniewski, D., Lesanovsky, I., & Köckenberger, W. (2015). Dynamic Nuclear Polarization as Kinetically Constrained Diffusion. Physical Review Letters, 115(2), Article 020404. https://doi.org/10.1103/physrevlett.115.020404

Dynamic nuclear polarization (DNP) is a promising strategy for generating a significantly increased nonthermal spin polarization in nuclear magnetic resonance (NMR) and its applications that range from medicine diagnostics to material science. Being... Read More about Dynamic Nuclear Polarization as Kinetically Constrained Diffusion.

Spin correlations as a probe of quantum synchronization in trapped ion phonon-lasers (2015)
Journal Article
Hush, M. R., Li, W., Genway, S., Lesanovsky, I., & Armour, A. (2015). Spin correlations as a probe of quantum synchronization in trapped ion phonon-lasers. Physical Review A, 91, Article 061401. https://doi.org/10.1103/PhysRevA.91.061401

We investigate quantum synchronization theoretically in a system consisting of two cold ions in microtraps. The ions' motion is damped by a standing-wave laser whilst also being driven by a blue-detuned laser which results in self-oscillation. Workin... Read More about Spin correlations as a probe of quantum synchronization in trapped ion phonon-lasers.

Strongly correlated growth of Rydberg aggregates in a vapor cell (2015)
Journal Article
Urvoy, A., Ripka, F., Lesanovsky, I., Booth, D., Shaffer, J., Pfau, T., & Löw, R. (2015). Strongly correlated growth of Rydberg aggregates in a vapor cell. Physical Review Letters, 114, Article 203002. https://doi.org/10.1103/PhysRevLett.114.203002

The observation of strongly interacting many-body phenomena in atomic gases typically requires ultracold samples. Here we show that the strong interaction potentials between Rydberg atoms enable the observation of many-body effects in an atomic vapor... Read More about Strongly correlated growth of Rydberg aggregates in a vapor cell.

Universal nonequilibrium properties of dissipative rydberg gases (2014)
Journal Article
Marcuzzi, M., Levi, E., Diehl, S., Garrahan, J. P., & Lesanovsky, I. (2014). Universal nonequilibrium properties of dissipative rydberg gases. Physical Review Letters, 113(21), Article 210401. https://doi.org/10.1103/PhysRevLett.113.210401

© 2014 American Physical Society. We investigate the out-of-equilibrium behavior of a dissipative gas of Rydberg atoms that features a dynamical transition between two stationary states characterized by different excitation densities. We determine th... Read More about Universal nonequilibrium properties of dissipative rydberg gases.

Effective dynamics of strongly dissipative Rydberg gases (2014)
Journal Article
Marcuzzi, M., Schick, J., Olmos, B., & Lesanovsky, I. (2014). Effective dynamics of strongly dissipative Rydberg gases. Journal of Physics A: Mathematical and Theoretical, 47(48), Article 482001. https://doi.org/10.1088/1751-8113/47/48/482001

We investigate the evolution of interacting Rydberg gases in the limit of strong noise and dissipation. Starting from a description in terms of a Markovian quantum master equation we derive effective equations of motion that govern the dynamics on a... Read More about Effective dynamics of strongly dissipative Rydberg gases.

Out-of-equilibrium evolution of kinetically constrained many-body quantum systems under purely dissipative dynamics (2014)
Journal Article
Lesanovsky, I., Garrahan, J. P., & OLMOS SANCHEZ, B. (2014). Out-of-equilibrium evolution of kinetically constrained many-body quantum systems under purely dissipative dynamics. Physical Review E, 90(4), doi:10.1103/PhysRevE.90.042147

Many-body out-of-equilibrium dynamics of hard-core lattice bosons with non-local loss (2014)
Journal Article
Everest, B., Hush, M., & Lesanovsky, I. (2014). Many-body out-of-equilibrium dynamics of hard-core lattice bosons with non-local loss. Physical Review B, 90(13), Article 134306. https://doi.org/10.1103/PhysRevB.90.134306

We explore the dynamics of hard-core lattice bosons in the presence of strong non-local particle loss. The evolution occurs on two distinct time-scales, first a rapid strongly correlated decay into a highly degenerate Zeno state subspace, followed by... Read More about Many-body out-of-equilibrium dynamics of hard-core lattice bosons with non-local loss.

Out-of-equilibrium structures in strongly interacting Rydberg gases with dissipation (2014)
Journal Article
Lesanovsky, I., & Garrahan, J. (2014). Out-of-equilibrium structures in strongly interacting Rydberg gases with dissipation. Physical Review A, 90(1), 1-5. doi:10.1103/PhysRevA.90.011603

The nonequilibrium dynamics of a gas of cold atoms in which Rydberg states are off-resonantly excited is studied in the presence of noise. The interplay between interaction and off-resonant excitation leads to an initial dynamics where aggregates of... Read More about Out-of-equilibrium structures in strongly interacting Rydberg gases with dissipation.

Electromagnetically induced transparency in an entangled medium (2014)
Journal Article
Li, W., Viscor, D., Hofferberth, S., & Lesanovsky, I. (2014). Electromagnetically induced transparency in an entangled medium. Physical Review Letters, 112(24), https://doi.org/10.1103/PhysRevLett.112.243601

We theoretically investigate light propagation and electromagnetically induced transparency (EIT) in a quasi one-dimensional gas in which atoms interact strongly via exchange interactions. We focus on the case in which the gas is initially prepared i... Read More about Electromagnetically induced transparency in an entangled medium.

Steady-state properties of a driven atomic ensemble with nonlocal dissipation (2014)
Journal Article
Yu, D., Olmos, B., Lesanovsky, I., OLMOS SANCHEZ, B., & YU, D. (2014). Steady-state properties of a driven atomic ensemble with nonlocal dissipation. Physical Review A, 89(2), doi:10.1103/physreva.89.023616

In a driven dense ensemble of two-level atoms the decay acts in a correlated way on several atoms simultaneously. The competition between the coherent laser excitation and the dipole-dipole interaction induced by the dissipation gives rise to a bimod... Read More about Steady-state properties of a driven atomic ensemble with nonlocal dissipation.

Generalized Dicke nonequilibrium dynamics in trapped ions (2014)
Journal Article
Genway, S., Li, W., Ates, C., Lanyon, B. P., & Lesanovsky, I. (2014). Generalized Dicke nonequilibrium dynamics in trapped ions. Physical Review Letters, 112(2),

We explore trapped ions as a setting to investigate nonequilibrium phases in a generalized Dicke model of dissipative spins coupled to phonon modes. We find a rich dynamical phase diagram including superradiantlike regimes, dynamical phase coexistenc... Read More about Generalized Dicke nonequilibrium dynamics in trapped ions.

Amplifying single impurities immersed in a gas of ultracold atoms (2011)
Journal Article
Olmos, B., Li, W., Hofferberth, S., & Lesanovsky, I. (2011). Amplifying single impurities immersed in a gas of ultracold atoms. Physical Review A, 84(4), Article 041607(R). https://doi.org/10.1103/PhysRevA.84.041607

We present a method for amplifying a single or scattered impurities immersed in a background gas of ultracold atoms so that they can be optically imaged and spatially resolved. Our approach relies on a Raman transfer between two stable atomic hyperfi... Read More about Amplifying single impurities immersed in a gas of ultracold atoms.