Dissipation-induced structural instability and chiral dynamics in a quantum gas

@article{Dogra2019DissipationinducedSI,
  title={Dissipation-induced structural instability and chiral dynamics in a quantum gas},
  author={Nishant Dogra and M Landini and Katrin Kroeger and Lorenz Hruby and Tobias Donner and Tilman Esslinger},
  journal={Science},
  year={2019},
  volume={366},
  pages={1496 - 1499}
}
Chirality by dissipation Quantum many-body systems can display exotic dynamics in the presence of dissipation. Dogra et al. studied such dynamics in a system consisting of an atomic Bose-Einstein condensate located in an optical cavity and exposed to a standing wave of laser light. Light scattering off the atomic cloud and into the cavity resulted in two distinct, spatially patterned collective modes for the atoms. When the researchers then introduced dissipation to couple the two modes, the… 

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References

SHOWING 1-10 OF 67 REFERENCES

Real-time observation of fluctuations at the driven-dissipative Dicke phase transition

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.

Measuring the dynamic structure factor of a quantum gas undergoing a structural phase transition

This work reports on a direct, real-time and nondestructive measurement of the dynamic structure factor of a quantum gas exhibiting cavity-mediated long-range interactions, and provides a theoretical description of this dissipative quantum many-body system.

Non-stationary coherent quantum many-body dynamics through dissipation

Conditions under which dissipation prevents quantum many-body systems from reaching a steady state are identified and they instead exhibit coherent oscillations, a dissipative version of a quantum time crystal.

Dissipation-Induced Instabilities of a Spinor Bose-Einstein Condensate Inside an Optical Cavity.

We investigate the dynamics of a spinor Bose-Einstein condensate inside an optical cavity, driven transversely by a laser with a controllable polarization angle. We focus on a two-component Dicke

Controlling the dynamics of an open many-body quantum system with localized dissipation.

The link between the dissipative dynamics and the measurement of the density distribution of the BEC allowing for a generalized definition of the Zeno effect is demonstrated.

Observation of the Mott insulator to superfluid crossover of a driven-dissipative Bose-Hubbard system

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.

Critical exponent of a quantum-noise-driven phase transition: The open-system Dicke model

The quantum phase transition of the Dicke model has been observed recently in a system formed by motional excitations of a laser-driven Bose-Einstein condensate coupled to an optical cavity [Baumann

Self-Ordered Limit Cycles, Chaos, and Phase Slippage with a Superfluid inside an Optical Resonator.

Dynamical phases of a driven Bose-Einstein condensate coupled to the light field of a high-Q optical cavity are studied to show a transition from a spatially homogeneous steady state to a self-ordered regular lattice exhibiting superradiant scattering into the cavity.

Dissipation-Induced Anomalous Multicritical Phenomena.

This work explores the influence of dissipation on a paradigmatic driven-dissipative model where a collection of two level atoms interact with both quadratures of a quantum cavity mode and shows that, surprisingly, the tricritical points exhibit anomalous finite fluctuations, as opposed to standard trICritical points arising in ^{3}He-^{4}He mixtures.

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
...