A quantum instanton method based on quasiprobability dynamics describes stationary states and asymptotic relaxation rates for large-spin collective systems, outperforming the Wigner approach by accounting for non-Gaussian fluctuations.
S´ epulcre, Analytical phase boundary of a quantum driven-dissipative Kerr oscillator from classical stochastic instantons, Phys
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Quantum instanton approach to metastable collective spins
A quantum instanton method based on quasiprobability dynamics describes stationary states and asymptotic relaxation rates for large-spin collective systems, outperforming the Wigner approach by accounting for non-Gaussian fluctuations.