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Title: Coherence properties of a two-dimensional trapped Bose gas around the superfluid transition

Abstract

We measure the momentum distribution of a two-dimensional 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 Hartree-Fock mean-field theory and quantum Monte Carlo simulations. In the normal phase, the momentum distribution is observed to sharpen well before the phase transition. This behavior is partially captured in a mean-field approach, in contrast to the physics of the BKT transition.

Authors:
; ; ; ;  [1];  [2];  [1]
  1. Laboratoire Charles Fabry, Institut d'Optique, CNRS, Universite Paris-Sud, 2 Avenue Augustin Fresnel, F-91127 Palaiseau CEDEX (France)
  2. LPTMC, UMR 7600 of CNRS, Universite P. et M. Curie, F-75752 Paris (France)
Publication Date:
OSTI Identifier:
22095528
Resource Type:
Journal Article
Journal Name:
Physical Review. A
Additional Journal Information:
Journal Volume: 84; Journal Issue: 6; Other Information: (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 1050-2947
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; BOSE-EINSTEIN GAS; COMPARATIVE EVALUATIONS; COMPUTERIZED SIMULATION; HARTREE-FOCK METHOD; MEAN-FIELD THEORY; MONTE CARLO METHOD; PHASE TRANSFORMATIONS; SUPERFLUIDITY; TRAPPING; TWO-DIMENSIONAL CALCULATIONS

Citation Formats

Plisson, T., Allard, B., Salomon, G., Aspect, A., Bourdel, T., Holzmann, M., Universite Grenoble 1, CNRS, LPMMC, UMR 5493, Boite Postale 166, F-38042 Grenoble, Bouyer, P., and LP2N, Universite Bordeaux 1, IOGS, CNRS, 351 Cours de la Liberation, F-33405 Talence. Coherence properties of a two-dimensional trapped Bose gas around the superfluid transition. United States: N. p., 2011. Web. doi:10.1103/PHYSREVA.84.061606.
Plisson, T., Allard, B., Salomon, G., Aspect, A., Bourdel, T., Holzmann, M., Universite Grenoble 1, CNRS, LPMMC, UMR 5493, Boite Postale 166, F-38042 Grenoble, Bouyer, P., & LP2N, Universite Bordeaux 1, IOGS, CNRS, 351 Cours de la Liberation, F-33405 Talence. Coherence properties of a two-dimensional trapped Bose gas around the superfluid transition. United States. https://doi.org/10.1103/PHYSREVA.84.061606
Plisson, T., Allard, B., Salomon, G., Aspect, A., Bourdel, T., Holzmann, M., Universite Grenoble 1, CNRS, LPMMC, UMR 5493, Boite Postale 166, F-38042 Grenoble, Bouyer, P., and LP2N, Universite Bordeaux 1, IOGS, CNRS, 351 Cours de la Liberation, F-33405 Talence. Thu . "Coherence properties of a two-dimensional trapped Bose gas around the superfluid transition". United States. https://doi.org/10.1103/PHYSREVA.84.061606.
@article{osti_22095528,
title = {Coherence properties of a two-dimensional trapped Bose gas around the superfluid transition},
author = {Plisson, T. and Allard, B. and Salomon, G. and Aspect, A. and Bourdel, T. and Holzmann, M. and Universite Grenoble 1, CNRS, LPMMC, UMR 5493, Boite Postale 166, F-38042 Grenoble and Bouyer, P. and LP2N, Universite Bordeaux 1, IOGS, CNRS, 351 Cours de la Liberation, F-33405 Talence},
abstractNote = {We measure the momentum distribution of a two-dimensional 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 Hartree-Fock mean-field theory and quantum Monte Carlo simulations. In the normal phase, the momentum distribution is observed to sharpen well before the phase transition. This behavior is partially captured in a mean-field approach, in contrast to the physics of the BKT transition.},
doi = {10.1103/PHYSREVA.84.061606},
url = {https://www.osti.gov/biblio/22095528}, journal = {Physical Review. A},
issn = {1050-2947},
number = 6,
volume = 84,
place = {United States},
year = {2011},
month = {12}
}