Dissipation Induced Nonstationarity in a Quantum Gas.

@article{Bua2019DissipationIN,
  title={Dissipation Induced Nonstationarity in a Quantum Gas.},
  author={Berislav Bu{\vc}a and Dieter Jaksch},
  journal={Physical review letters},
  year={2019},
  volume={123 26},
  pages={
          260401
        }
}
Nonstationary longtime dynamics was recently observed in a driven two-component Bose-Einstein condensate coupled to an optical cavity [N. Dogra, M. Landini, K. Kroeger, L. Hruby, T. Donner, and T. Esslinger, arXiv:1901.05974] and analyzed in mean-field theory. We solve the underlying model in the thermodynamic limit and show that this system is always dynamically unstable-even when mean-field theory predicts stability. Instabilities always occur in higher-order correlation functions leading to… 

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References

SHOWING 1-10 OF 84 REFERENCES

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

Driven Bose-Hubbard dimer under nonlocal dissipation: A bistable time crystal

We investigate the critical behavior of the open coherently-driven Bose-Hubbard dimer under nonlocal dissipation. A conserved quantity arises from the nonlocal nature of the dissipation, rendering

Shattered time: can a dissipative time crystal survive many-body correlations?

We investigate the emergence of a time crystal (TC) in a driven dissipative many-body spin array. In this system the interplay between incoherent spin pumping and collective emission stabilizes a

Dicke time crystals in driven-dissipative quantum many-body systems

The Dicke model—a paradigmatic example of superradiance in quantum optics—describes an ensemble of atoms which are collectively coupled to a leaky cavity mode. As a result of the cooperative nature

Constructing the generalized Gibbs ensemble after a quantum quench.

A general construction is exhibited of the thermodynamic ensemble that has been suggested to govern this dynamics, the generalized Gibbs ensemble, and the predictions of equilibration from this ensemble are compared against the long time dynamics observed using this method.

Discrete Time-Crystalline Order in Cavity and Circuit QED Systems.

A phenomenology of dissipative discrete time crystals is established by generalizing the Landau theory of phase transitions to Floquet open systems and finding clear signatures of a transient discrete time-crystalline behavior, which is absent in the isolated counterpart.

Driven-dissipative quantum dynamics in ultra-long-lived dipoles in an optical cavity

We study the quantum dynamics of many-body arrays of two-level atoms in a driven cavity subject to collective decay and interactions mediated by the cavity field. We work in the bad cavity limit

Dephasing and the steady state in quantum many-particle systems.

It follows further that, after a quench of system parameters, entanglement entropy will become extensive and this provides a way of creating strongEntanglement in a controlled fashion.

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.

Emergent limit cycles and time crystal dynamics in an atom-cavity system

We propose an experimental realization of a time crystal using an atomic Bose-Einstein condensate in a high finesse optical cavity pumped with laser light detuned to the blue side of the relevant
...