Phase-space methods for simulating the dissipative many-body dynamics of collective spin systems

  title={Phase-space methods for simulating the dissipative many-body dynamics of collective spin systems},
  author={Julian Huber and Peter Kirton and Peter Rabl},
  journal={SciPost Physics},
We describe an efficient numerical method for simulating the dynamics and steady states of collective spin systems in the presence of dephasing and decay. The method is based on the Schwinger boson representation of spin operators and uses an extension of the truncated Wigner approximation to map the exact open system dynamics onto stochastic differential equations for the corresponding phase space distribution. This approach is most effective in the limit of very large spin quantum numbers… 

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