Response functions and superfluid density in a weakly interacting Bose gas with non-quadratic dispersion
Mesoscale and Nanoscale Physics
2007-05-23 v1
Abstract
Motivated by the experimental search for Bose condensation of quasiparticles in semiconductors, the response functions of a weakly interacting Bose gas, with isotropic but non-quadratic dispersion, are considered. Non-quadratic dispersion modifies the definition of particle current, and leads to modified sum rules for the current-current response function. The effect of these modifications on the Berezhinski-Kosterlitz-Thouless transition is discussed.
Keywords
Cite
@article{arxiv.cond-mat/0605494,
title = {Response functions and superfluid density in a weakly interacting Bose gas with non-quadratic dispersion},
author = {Jonathan Keeling},
journal= {arXiv preprint arXiv:cond-mat/0605494},
year = {2007}
}
Comments
4 pages, 2 figures