Publication
Title
Extension of the Ginzburg-Landau approach for ultracold Fermi gases below a critical temperature
Author
Abstract
In the context of superfluid Fermi gases, the Ginzburg-Landau (GL) formalism for the macroscopic wave function has been successfully extended to the whole temperature range where the superfluid state exists. After reviewing the formalism, we first investigate the temperature-dependent correction to the standard GL expansion (which is valid close to T-c). Deviations from the standard GL formalism are particularly important for the kinetic energy contribution to the GL energy functional, which in turn influences the healing length of the macroscopic wave function. We apply the formalism to variationally describe vortices in a strong-coupling Fermi gas in the BEC-BCS crossover regime, in a two-band system. The healing lengths, derived as variational parameters in the vortex wave function, are shown to exhibit hidden criticality well below T-c. (C) 2014 Elsevier B.V. All rights reserved.
Language
English
Source (journal)
Physica: C: superconductivity. - Amsterdam
Publication
Amsterdam : 2014
ISSN
0921-4534
Volume/pages
503(2014), p. 136-139
ISI
000340070600028
Full text (Publisher's DOI)
Full text (open access)
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 08.09.2014
Last edited 12.06.2017
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