Beyond mean-field dynamics in open Bose-Hubbard chains

Details Beyond mean-field dynamics in open Bose-Hubbard chains Beyond mean-field dynamics in open Bose-Hubbard chains

2012-03-16

arxiv.org/abs/1203.3657v1

Phys. Rev. A 83, 063608 (2011)

Physics

Condensed Matter

Quantum Gases

7 pages, 6 figure

Scientific paper

10.1103/PhysRevA.83.063608

We investigate the effects of phase noise and particle loss on the dynamics of a Bose-Einstein condensate in an optical lattice. Starting from the many-body master equation, we discuss the applicability of generalized mean-field approximations in the presence of dissipation as well as methods to simulate quantum effects beyond mean-field by including higher-order correlation functions. It is shown that localized particle dissipation leads to surprising dynamics, as it can suppress decay and restore the coherence of a Bose-Einstein condensate. These effects can be applied to engineer coherent structures such as stable discrete breathers and dark solitons.

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