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Variational dynamics of open quantum systems in phase space
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We present a method to simulate the dynamics of large driven-dissipative many-body open quantum systems using a variational encoding of the Wigner or Husimi-Q quasi-probability distributions. The method relies on Monte-Carlo sampling to maintain a polynomial computational complexity while allowing for several quantities to be estimated efficiently. As a first application, we present a proof of principle investigation into the physics of the driven-dissipative Bose-Hubbard model with weak nonlinearity, providing evidence for the high efficiency of the phase space variational approach.
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Cited by 1 Pith paper
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Variational Multi-Gaussian Phase-Space Dynamics via Automatic Differentiation
A multi-Gaussian Wigner-function variational method simulates open bosonic dynamics and finds Ising-like critical slowing down in a driven-dissipative Bose-Hubbard lattice.
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