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Article Dans Une Revue Physical Review A : Atomic, molecular, and optical physics [1990-2015] Année : 2011

Coherence properties of a 2D trapped Bose gas around the superfluid transition

Résumé

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.
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hal-00632508 , version 1 (14-10-2011)

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Thomas Plisson, Baptiste Allard, Markus Holzmann, Guillaume Salomon, Alain Aspect, et al.. Coherence properties of a 2D trapped Bose gas around the superfluid transition. Physical Review A : Atomic, molecular, and optical physics [1990-2015], 2011, 84 (9-10), pp.061606(R). ⟨hal-00632508⟩
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