@article{2007-gerbier-bloch-arxiv0701.420, 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.}, Author = {Gerbier, F. AND Fölling, S. AND Widera, A. AND Bloch, I.}, Journal = {arXiv:0701.420}, Pages = {}, Title = {{Visibility of a Bose-condensed gas released from an optical lattice at finite temperatures}}, Volume = {}, Year = {2007} }