Non-equilibrium steady states and critical slowing down in the dissipative Bose-Hubbard model
arXiv:2302.02977 · doi:10.1103/PhysRevA.108.013314
Abstract
Motivated by recent experiments, we study the properties of large Bose-Hubbard chains with single-particle losses at one site using classical field methods. We construct and validate a compact effective model that reduces computations to only a few sites. We show that in the mean-field approach the description captures the stationary states of the dissipative mode very well. Not only is there a good quantitative agreement in the hysteresis loop, the dark soliton state can be reproduced as well due to the the preservation of the symmetry. Bimodality of the steady states, observed on longer timescales, is studied using the truncated Wigner method. We compare the switching statistics and derive the effective Liouvillian gap in function of the tunneling, showing that the effective description underestimates fluctuations.
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