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 and 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.
Beyond mean-field dynamics in open Bose-Hubbard chains / Holger, Hennig; Dirk, Witthaut; Friederike, Trimborn; Georgios, Kordas; Theo, Geisel; Wimberger, Sandro Marcel. - In: BULLETIN OF THE AMERICAN PHYSICAL SOCIETY. - ISSN 0003-0503. - 56:1(2011), p. BAPS.2011.MAR.Q45.13.
Beyond mean-field dynamics in open Bose-Hubbard chains
WIMBERGER, Sandro Marcel
2011-01-01
Abstract
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 and 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.| File | Dimensione | Formato | |
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