Dissipation Induced Nonstationarity in a Quantum Gas.

  title={Dissipation Induced Nonstationarity in a Quantum Gas.},
  author={Berislav Bu{\vc}a and Dieter Jaksch},
  journal={Physical review letters},
  volume={123 26},
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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