Symmetry breaking induced by random fluctuations for Bose-Einstein condensates in a double-well trap

Details Symmetry breaking induced by random fluctuations for Bose-Einstein condensates in a double-well trap Symmetry breaking induced by random fluctuations for Bose-Einstein condensates in a double-well trap

2004-09-18

arxiv.org/abs/cond-mat/0409479v1

Physics

Condensed Matter

Other Condensed Matter

12 pages, 6 figures

Scientific paper

10.1103/PhysRevA.71.033603

This paper is devoted to the study of the dynamics of two weakly-coupled Bose-Einstein condensates confined in a double-well trap and perturbed by random external forces. Energy diffusion due to random forcing allows the system to visit symmetry-breaking states when the number of atoms exceeds a threshold value. The energy distribution evolves to a stationary distribution which depends on the initial state of the condensate only through the total number of atoms. This loss of memory of the initial conditions allows a simple and complete description of the stationary dynamics of the condensate which randomly visits symmetric and symmetry-breaking states.

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