Publication
Title
Pair excitations and parameters of state of imbalanced Fermi gases at finite temperatures
Author
Abstract
The spectra of low-lying pair excitations for an imbalanced two-component superfluid Fermi gas are analytically derived within the path-integral formalism taking into account Gaussian fluctuations about the saddle point. The spectra are obtained for nonzero temperatures, both with and without imbalance, and for arbitrary interaction strength. On the basis of the pair excitation spectrum, we have calculated the thermodynamic parameters of state of cold fermions and the first and second sound velocities. The parameters of pair excitations show a remarkable agreement with the Monte Carlo data and with experiment.
Language
English
Source (journal)
Journal of low temperature physics. - New York
Publication
New York : 2011
ISSN
0022-2291
Volume/pages
165:5/6(2011), p. 261-274
ISI
000298333500008
Full text (Publisher's DOI)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 03.11.2011
Last edited 17.07.2017
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