Kosterlitz-Thouless Transition of the Quasi-Two-Dimensional Trapped Bose Gas

Journal Article · Fri May 16 04:00:00 EDT 2008 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.100.190402· OSTI ID:21132405

Holzmann, Markus; Krauth, Werner ^[1]

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1. LPTMC, Universite Pierre et Marie Curie, 4 Place Jussieu, 75005 Paris, France, and LPMMC, CNRS-UJF, BP 166, 38042 Grenoble (France)

We use quantum Monte Carlo methods to compute the density profile, the nonclassical moment of inertia, and the condensate fraction of an interacting quasi-two-dimensional trapped Bose gas with up to N{approx}5x10{sup 5} atoms and parameters closely related to recent experiments. We locate the Kosterlitz-Thouless temperature T{sub KT} and discuss intrinsic signatures of the onset of superfluidity in the density profile. Below T{sub KT}, the condensate fraction is macroscopic even for our largest systems and decays only slowly with system size. We show that the thermal population of excited states in the transverse direction changes the two-dimensional density profile noticeably in both the normal and the superfluid phase.

• OSTI ID: 21132405
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 19 Vol. 100; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BOSE-EINSTEIN GAS
DENSITY
EXCITED STATES
MOMENT OF INERTIA
MONTE CARLO METHOD
SUPERFLUIDITY
TRAPPING
TWO-DIMENSIONAL CALCULATIONS