All Outputs (16)

Quantum and Classical Temporal Correlations in (1+1)D Quantum Cellular Automata (2021)
Journal Article

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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.