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.
Beyond mean-field dynamics in open Bose-Hubbard chains / Witthaut, D.; Trimborn, F.; Hennig, H.; Kordas, G.; Geisel, T.; Wimberger, Sandro Marcel. - In: PHYSICAL REVIEW A. - ISSN 1050-2947. - 83:6(2011), p. 063608. [10.1103/PhysRevA.83.063608]
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 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.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
