A semi-classical field method for the equilibrium Bose gas and application to thermal vortices in two dimensions
Other Condensed Matter
2009-11-13 v1
Abstract
We develop a semi-classical field method for the study of the weakly interacting Bose gas at finite temperature, which, contrarily to the usual classical field model, does not suffer from an ultraviolet cut-off dependence. We apply the method to the study of thermal vortices in spatially homogeneous, two-dimensional systems. We present numerical results for the vortex density and the vortex pair distribution function. Insight in the physics of the system is obtained by comparing the numerical results with the predictions of simple analytical models. In particular, we calculate the activation energy required to form a vortex pair at low temperature.
Keywords
Cite
@article{arxiv.0705.1226,
title = {A semi-classical field method for the equilibrium Bose gas and application to thermal vortices in two dimensions},
author = {Luca Giorgetti and Iacopo Carusotto and Yvan Castin},
journal= {arXiv preprint arXiv:0705.1226},
year = {2009}
}
Comments
19 pages