Emerging Dissipative Phases in a Superradiant Quantum Gas with Tunable Decay

@article{Ferri2021EmergingDP,
  title={Emerging Dissipative Phases in a Superradiant Quantum Gas with Tunable Decay},
  author={Francesco Ferri and Rodrigo Rosa-Medina and Fabian Finger and Nishant Dogra and Matteo Soriente and Oded Zilberberg and Tobias Donner and Tilman Esslinger},
  journal={Physical Review X},
  year={2021}
}
Exposing a many-body system to external drives and losses can transform the nature of its phases and opens perspectives for engineering new properties of matter. How such characteristics are related to the underlying microscopic processes of the driven and dissipative system is a fundamental question. Here we address this point in a quantum gas that is strongly coupled to a lossy optical cavity mode using two independent Raman drives, which act on the spin and motional degrees of freedom of the… 

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References

SHOWING 1-10 OF 81 REFERENCES
Dissipation-induced structural instability and chiral dynamics in a quantum gas
TLDR
In a regime of dominant dissipative coupling, the chiral evolution is observed and related to a positional instability and is observed in a synthetic many-body system with independently controllable unitary and dissipative couplings.
Observation of the Mott insulator to superfluid crossover of a driven-dissipative Bose-Hubbard system
TLDR
The controllability of the dissipation is highlighted by quenching the Dissipation, providing a novel method for investigating a quantum many-body state and its nonequilibrium dynamics.
Observation of a non-Hermitian phase transition in an optical quantum gas
TLDR
A non-Hermitian phase transition of a photon Bose-Einstein condensation to a dissipative phase characterized by a biexponential decay of the condensate’s second-order coherence is experimentally demonstrated.
Distinguishing phases using the dynamical response of driven-dissipative light-matter systems
We present a peculiar transition triggered by infinitesimal dissipation in the interpolating Dicke-Tavis-Cummings model. The model describes a ubiquitous light-matter setting using a collection of
Real-time observation of fluctuations at the driven-dissipative Dicke phase transition
TLDR
Using a dissipation channel to nondestructively gain information about a quantum many-body system provides a unique path to study the physics of driven-dissipative systems.
Signatures of a dissipative phase transition in photon correlation measurements
Understanding and characterizing phase transitions in driven-dissipative systems constitutes a new frontier for many-body physics1–8. A generic feature of dissipative phase transitions is a vanishing
Nonlinear semiclassical dynamics of the unbalanced, open Dicke model
In recent years there have been significant advances in the study of many-body interactions between atoms and light confined to optical cavities. One model which has received widespread attention of
Dicke quantum phase transition with a superfluid gas in an optical cavity
TLDR
The Dicke quantum phase transition is realized in an open system formed by a Bose–Einstein condensate coupled to an optical cavity, and the emergence of a self-organized supersolid phase is observed.
Keldysh field theory for driven open quantum systems.
TLDR
This work provides a systematic introduction to the open system Keldysh functional integral approach, which is the proper technical tool to accomplish a merger of quantum optics and many-body physics, and leverages the power of modern quantum field theory to driven open quantum systems.
A dissipatively stabilized Mott insulator of photons
TLDR
A versatile method for dissipative preparation of incompressible many-body phases through reservoir engineering is developed and used to stabilize a Mott insulator phase of photons trapped in a superconducting circuit, providing insights into thermalization processes in strongly correlated quantum matter.
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