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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.

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.

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.

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.