All Outputs (138)

Tripartite quantum Rabi model with trapped Rydberg ions (2024)
Journal Article

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 f... Read More about Tripartite quantum Rabi model with trapped Rydberg ions.

Spectral Signatures of Vibronic Coupling in Trapped Cold Ionic Rydberg Systems (2024)
Journal Article

Atoms and ions confined with electric and optical fields form the basis of many current quantum simulation and computing platforms. When excited to high-lying Rydberg states, long-ranged dipole interactions emerge which strongly couple the electronic... Read More about Spectral Signatures of Vibronic Coupling in Trapped Cold Ionic Rydberg Systems.

Quantum thermodynamics of boundary time-crystals (2024)
Journal Article

Time-translation symmetry breaking is a mechanism for the emergence of non-stationary many-body phases, so-called time-crystals, in Markovian open quantum systems. Dynamical aspects of time-crystals have been extensively explored over the recent year... Read More about Quantum thermodynamics of boundary time-crystals.

Universal and nonuniversal probability laws in Markovian open quantum dynamics subject to generalized reset processes (2024)
Journal Article

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

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.

Quantum reaction-limited reaction–diffusion dynamics of noninteracting Bose gases (2024)
Journal Article

We investigate quantum reaction–diffusion (RD) systems in one-dimension with bosonic particles that coherently hop in a lattice, and when brought in range react dissipatively. Such reactions involve binary annihilation (A + A → ∅) and coagulation (A... Read More about Quantum reaction-limited reaction–diffusion dynamics of noninteracting Bose gases.

Coherent Spin-Phonon Scattering in Facilitated Rydberg Lattices (2024)
Journal Article

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

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

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

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

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

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

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

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

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

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

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

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

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

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.