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Coherence properties of a 2D trapped Bose gas around the superfluid transition
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.
Cited literature [21 references]
https://hal.archives-ouvertes.fr/hal-00632508
Contributor : Thomas Bourdel Connect in order to contact the contributor
Submitted on : Friday, October 14, 2011 - 3:03:40 PM
Last modification on : Sunday, June 26, 2022 - 11:54:38 AM
Long-term archiving on: : Sunday, January 15, 2012 - 2:23:03 AM
Contributor : Thomas Bourdel Connect in order to contact the contributor
Submitted on : Friday, October 14, 2011 - 3:03:40 PM
Last modification on : Sunday, June 26, 2022 - 11:54:38 AM
Long-term archiving on: : Sunday, January 15, 2012 - 2:23:03 AM
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