Connecting Berezinskii-Kosterlitz-Thouless and BEC phase transitions by tuning interactions in a trapped gas
Quantum Gases
2015-06-30 v2 Statistical Mechanics
Atomic Physics
Quantum Physics
Abstract
We study the critical point for the emergence of coherence in a harmonically trapped two-dimensional Bose gas with tuneable interactions. Over a wide range of interaction strengths we find excellent agreement with the classical-field predictions for the critical point of the Berezinskii-Kosterlitz-Thouless (BKT) superfluid transition. This allows us to quantitatively show, without any free parameters, that the interaction-driven BKT transition smoothly converges onto the purely quantum-statistical Bose-Einstein condensation (BEC) transition in the limit of vanishing interactions.
Keywords
Cite
@article{arxiv.1501.02262,
title = {Connecting Berezinskii-Kosterlitz-Thouless and BEC phase transitions by tuning interactions in a trapped gas},
author = {Richard J. Fletcher and Martin Robert-de-Saint-Vincent and Jay Man and Nir Navon and Robert P. Smith and Konrad G. H. Viebahn and Zoran Hadzibabic},
journal= {arXiv preprint arXiv:1501.02262},
year = {2015}
}
Comments
4 pages, 3 figures