Stability of the homogeneous Bose-Einstein condensate at large gas parameter
Statistical Mechanics
2009-11-13 v2 Nuclear Theory
Atomic Physics
Abstract
The properties of the uniform Bose gas is studied within the optimized variational perturbation theory (Gaussian approximation) in a self-consistent way. It is shown that the atomic BEC with a repulsive interaction becomes unstable when the gas parameter gamma=rho a^3 exceeds a critical value gamma_{crit} ~ 0.01. The quantum corrections beyond the Bogoliubov-Popov approximation to the energy density, chemical potential and pressure in powers of gamma expansions are presented.
Cite
@article{arxiv.0801.1387,
title = {Stability of the homogeneous Bose-Einstein condensate at large gas parameter},
author = {Abdulla Rakhimov and Chul Koo Kim and Sang-Hoon Kim and Jae Hyung Yee},
journal= {arXiv preprint arXiv:0801.1387},
year = {2009}
}
Comments
9 pages, 3 figures, Revtex