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Pré-Publication, Document De Travail Année : 2007

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

Résumé

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.

Dates et versions

hal-00149581 , version 1 (27-05-2007)

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Fabrice Gerbier, Simon Foelling, Artur Widera, Immanuel Bloch. Visibility of a Bose-condensed gas released from an optical lattice at finite temperatures. 2007. ⟨hal-00149581⟩
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