Visco-elastic spectra of a dilute Bose fluid
Statistical Mechanics
2009-10-31 v1
Abstract
A recently developed local-density current functional formalism for confined Bose-condensed superfluids requires visco-elastic spectra which are defined through a finite-frequency extension of the dissipative coefficients entering the linearized hydrodynamic equations of the two-fluid model. We evaluate these spectra for a superfluid with contact interactions in the collisionless regime at finite temperature, by working to first order beyond the Bogolubov approximation. We find that within this approximation all the visco-elastic spectra take the same value aside from simple multiplicative factors.
Keywords
Cite
@article{arxiv.cond-mat/9809293,
title = {Visco-elastic spectra of a dilute Bose fluid},
author = {A. Minguzzi and M. P. Tosi},
journal= {arXiv preprint arXiv:cond-mat/9809293},
year = {2009}
}
Comments
13 pages, 2 figures