Observation of phase defects in quasi-two-dimensional Bose-Einstein condensates.
We have observed phase defects in quasi-2D Bose-Einstein condensates close to the condensation temperature. Either a single or several equally spaced condensates are produced by selectively evaporating the sites of a 1D optical lattice. When several clouds are released from the lattice and allowed to overlap, dislocation lines in the interference patterns reveal nontrivial phase defects.
Stock
Sabine
S
Laboratoire Kastler Brossel, 24 rue Lhomond, 75005 Paris, France.
Hadzibabic
Zoran
Z
Battelier
Baptiste
B
Cheneau
Marc
M
Dalibard
Jean
J