| Issue |
EPL
Volume 82, Number 3, May 2008
|
|
|---|---|---|
| Article Number | 30001 | |
| Number of page(s) | 5 | |
| Section | General | |
| DOI | https://doi.org/10.1209/0295-5075/82/30001 | |
| Published online | 16 April 2008 | |
Semiclassical theory of the quasi
two-dimensional trapped Bose gas
1
LPTMC, Université Pierre et Marie Curie - 4 Place Jussieu, 75005 Paris, France, EU
2
LPMMC, CNRS-UJF - BP 166, 38042 Grenoble, France, EU
3
CNRS-Laboratoire de Physique Statistique, Ecole Normale Supérieure - 24 rue Lhomond, 75231 Paris Cedex 05, France, EU
Corresponding author: werner.krauth@lps.ens.fr
Received:
18
January
2008
Accepted:
9
March
2008
We discuss the quasitwo-dimensional trapped Bose gas where
the thermal occupation of excited states in the tightly confined direction is small
but remains finite in the thermodynamic limit. We show that the semiclassical
theory describes very accurately the density profile obtained by quantum Monte
Carlo calculations in the normal phase above the Kosterlitz-Thouless temperature
TKT, but
differs strongly from the predictions of strictly two-dimensional mean-field theory, even
at relatively high temperature. We discuss the relevance of our findings for analyzing
ultra-coldatom experiments in quasitwo-dimensional traps.
PACS: 03.75.Hh – Static properties of condensates; thermodynamical, statistical, and structural properties / 05.30.Jp – Boson systems
© EPLA, 2008
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