Coherence properties of a 2D trapped Bose gas around the superfluid transition
Atomic Physics
2015-05-30 v1
Abstract
We measure the momentum distribution of a 2D trapped Bose gas and observe the increase of the range of coherence around the Berezinskii-Kosterlitz-Thouless (BKT) transition. We quantitatively compare our observed profiles to both a Hartee-Fock mean-field theory and to quantum Monte-Carlo simulations. In the normal phase, we already observe a sharpening of the momentum distribution. This behavior is partially captured in a mean-field approach, in contrast to the physics of the BKT transition.
Keywords
Cite
@article{arxiv.1110.3201,
title = {Coherence properties of a 2D trapped Bose gas around the superfluid transition},
author = {T. Plisson and B. Allard and M. Holzmann and G. Salomon and Alain Aspect and Philippe Bouyer and Thomas Bourdel},
journal= {arXiv preprint arXiv:1110.3201},
year = {2015}
}