Phase diffusion of Bose-Einstein condensates in a one-dimensional optical lattice

Details Phase diffusion of Bose-Einstein condensates in a one-dimensional optical lattice Phase diffusion of Bose-Einstein condensates in a one-dimensional optical lattice

2002-12-04

arxiv.org/abs/cond-mat/0212087v2

J. Phys. B: At. Mol. Opt. Phys. 36 (2003) 3315

Physics

Condensed Matter

Soft Condensed Matter

Revtex, 6 pages, 4 eps figures. This revised version has been accepted by J. Physics. B. E-mail: hongweixiong@hotmail.com

Scientific paper

10.1088/0953-4075/36/15/312

We investigate the phase diffusion of a Bose-Einstein condensate (BEC) confined in the combined potential of a magnetic trap and a one-dimensional optical lattice. We show that the phase diffusion of the condensate in the whole optical lattice is evident and can be measured from the interference pattern of expanding subcondensates after the optical lattice is switched off. The maximum density of the interference pattern decreases significantly due to the mixing of the phase diffusion appearing in different subcondensates. This suggests a way to detect experimentally the notable phase diffusion of BECs.

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