Interference between a large number of independent Bose-Einstein condensates

Details Interference between a large number of independent Bose-Einstein condensates Interference between a large number of independent Bose-Einstein condensates

2004-07-16

arxiv.org/abs/cond-mat/0407414v1

Phys. Rev. A 71, 063602 (2005)

Physics

Condensed Matter

Soft Condensed Matter

9 pages, 2 figures

Scientific paper

10.1103/PhysRevA.71.063602

We study theoretically the interference patterns produced by the overlap of an array of Bose-Einstein condensates that have no phase coherence among them. We show that density-density correlations at different quasimomenta, which play an important role in two-condensate interference, become negligible for large $N$, where $N$ is the number of overlapping condensates. In order to understand the physics of this phenomenon, it is sufficient to consider the periodicity of the lattice and the statistical probability distribution of a random-walk problem. The average visibility of such interference patterns decreases as $N^{-1/2}$ for large $N$.

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