Visibility of a Bose-condensed gas released from an optical lattice at finite temperatures

Fabrice Gerbier; Simon Foelling; Artur Widera; Immanuel Bloch

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Visibility of a Bose-condensed gas released from an optical lattice at finite temperatures

Fabrice Gerbier·Simon Foelling·Artur Widera·Immanuel Bloch

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Abstract

In response to a recent manuscript [cond-mat/0609685] on the analysis of interference patterns produced by ultracold atoms released from an optical lattice, we point out that in the presence of a Bose-Einstein condensate the interference pattern can be strongly modified by interaction effects and the presence of a harmonic trap superimposed on the lattice potential. Our results show that the visibility of the interference pattern is significant only if a sizeable condensate fraction is present in the trap.

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Fabrice Gerbier, Simon Foelling, Artur Widera, Immanuel Bloch. 2007-01-17. Visibility of a Bose-condensed gas released from an optical lattice at finite temperatures. https://arxiv.org/abs/cond-mat/0701420

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