Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

arXiv:2102.02537 · Physical Review Research

Breaking strong symmetries in dissipative quantum systems: Bosonic atoms coupled to a cavity

Catalin-Mihai Halati, Ameneh Sheikhan, Corinna Kollath

Published Feb 11, 2022• 32 citations
arXivHTMLPDF

Abstract

The authors investigate the effects of a strong symmetry on the self-organization transition of bosonic atoms in a dissipative cavity and analyze the non-equilibrium dynamics which results from breaking the strong symmetry.
DOI
10.1103/physrevresearch.4.l012015

Related papers

Observation of self-organized coherence in dissipative spinor Bose-Einstein condensates

Yujiro Eto, Hitoshi Shibayama, Aki Torii +2 more

Dissipation is a ubiquitous phenomenon, and it is important to understand its role in non-equilibrium dynamics. In the quantum systems, dissipation often reduce the coherence of the quantum states. But sometimes, it induces completely different effects than the decoherence. For example, strong dissipation can be used to suppress the loss [1] and control the quantum state [2] and quantum phase transition [3].

JSAP-OSA Joint Symposia•Jan 1, 2017•0 citations

Symmetry breaking and non-ergodicity in a driven-dissipative ensemble of multilevel atoms in a cavity

Enrique Hernandez, Elmer Suarez, Igor Lesanovsky +3 more

Dissipative light-matter systems can display emergent collective behavior. Here, we report a Z 2 -symmetry-breaking phase transition in a system of multilevel Rb 87 atoms strongly coupled to a weakly driven two-mode optical cavity. In the symmetry-broken phase, nonergodic dynamics manifests in the emergence of multiple stationary states with disjoint basins of attraction. This feature enables the amplification of a small atomic population imbalance into a characteristic macroscopic cavity transmission signal. Our experiment does not only showcase strongly dissipative atom-cavity systems as platforms for probing nontrivial collective many-body phenomena, but also highlights their potential for hosting technological applications in the context of sensing, density classification, and pattern retrieval dynamics within associative memories. Published by the American Physical Society 2024

arXiv:2405.09885•Physical Review Research•Sep 26, 2024•1 citation

Breaking the symmetry in an atomic gas

Jelena Stajic

Quantum Gases Cooling a physical system through a phase transition typically makes it less symmetrical. If the cooling is done very slowly, this symmetry change is uniform throughout the system. For a faster cooling process, the system breaks up into domains: The faster the cooling, the smaller the

Science•Jan 8, 2015•0 citations

Breaking strong symmetries in dissipative quantum systems: the (non-)interacting bosonic chain coupled to a cavity

Catalin-Mihai Halati, Ameneh Sheikhan, Corinna Kollath

In dissipative quantum systems, strong symmetries can lead to the existence of conservation laws and multiple steady states. The investigation of such strong symmetries and their consequences on the dynamics of the dissipative systems is still in its infancy. In this work we investigate a strong symmetry for bosonic atoms coupled to an optical cavity, an experimentally relevant system, using adiabatic elimination techniques and numerically exact matrix product state methods. We show the existence of multiple steady states for ideal bosons coupled to the cavity. We find that the introduction of a weak breaking of the strong symmetry by a small interaction term leads to a direct transition from multiple steady states to a unique steady state. We point out the phenomenon of dissipative freezing, the breaking of the conservation law at the level of individual realizations in the presence of the strong symmetry. For a weak breaking of the strong symmetry we see that the behavior of the individual trajectories still shows some signs of this dissipative freezing before it fades out for a larger symmetry breaking terms.

•Feb 4, 2021•7 citations

Universal non-equilibrium dynamics in Bose condensed atomic gases undergoing spontaneous symmetry breaking

Xunda Jiang, Zhu Ma, Jun Xu +1 more

Chinese Science Bulletin (Chinese Version)•Sep 15, 2021•0 citations

Controlling the Dynamics of Atomic Correlations via the Coupling to a Dissipative Cavity

Catalin-Mihai Halati, Ameneh Sheikhan, Giovanna Morigi +1 more

We analyze the relaxation dynamics in an open system, composed by a quantum gas of bosons in a lattice interacting via both contact and global interactions. We report the onset of periodic oscillations of the atomic coherences exhibiting hallmarks of synchronization after a quantum quench. The dynamical behavior exhibits the many-body collapse and revival of atomic coherences and emerges from the interplay of the quantum dissipative nature of the cavity field and the presence of a (approximate) strong symmetry in the dissipative system. We further show that the approximate symmetry can dynamically self-organize. We argue that the approximate symmetry can be tailored to obtain long-lived coherences. These insights provide a general recipe to engineer the dynamics of globally interacting systems.

arXiv:2403.20096•Physical Review Letters•Feb 21, 2025•10 citations
Dissipative light-matter systems can display emergent collective behavior. Here, we report a Z 2 -symmetry-breaking phase transition in a system of multilevel Rb 87 atoms strongly coupled to a weakly driven two-mode optical cavity. In the symmetry-broken phase, nonergodic dynamics manifests in the emergence of multiple stationary states with disjoint basins of attraction. This feature enables the amplification of a small atomic population imbalance into a characteristic macroscopic cavity transmission signal. Our experiment does not only showcase strongly dissipative atom-cavity systems as platforms for probing nontrivial collective many-body phenomena, but also highlights their potential for hosting technological applications in the context of sensing, density classification, and pattern retrieval dynamics within associative memories. Published by the American Physical Society 2024
In dissipative quantum systems, strong symmetries can lead to the existence of conservation laws and multiple steady states. The investigation of such strong symmetries and their consequences on the dynamics of the dissipative systems is still in its infancy. In this work we investigate a strong symmetry for bosonic atoms coupled to an optical cavity, an experimentally relevant system, using adiabatic elimination techniques and numerically exact matrix product state methods. We show the existence of multiple steady states for ideal bosons coupled to the cavity. We find that the introduction of a weak breaking of the strong symmetry by a small interaction term leads to a direct transition from multiple steady states to a unique steady state. We point out the phenomenon of dissipative freezing, the breaking of the conservation law at the level of individual realizations in the presence of the strong symmetry. For a weak breaking of the strong symmetry we see that the behavior of the individual trajectories still shows some signs of this dissipative freezing before it fades out for a larger symmetry breaking terms.
We analyze the relaxation dynamics in an open system, composed by a quantum gas of bosons in a lattice interacting via both contact and global interactions. We report the onset of periodic oscillations of the atomic coherences exhibiting hallmarks of synchronization after a quantum quench. The dynamical behavior exhibits the many-body collapse and revival of atomic coherences and emerges from the interplay of the quantum dissipative nature of the cavity field and the presence of a (approximate) strong symmetry in the dissipative system. We further show that the approximate symmetry can dynamically self-organize. We argue that the approximate symmetry can be tailored to obtain long-lived coherences. These insights provide a general recipe to engineer the dynamics of globally interacting systems.