Title
Extension of the Ginzburg-Landau approach for ultracold Fermi gases below a critical temperature Extension of the Ginzburg-Landau approach for ultracold Fermi gases below a critical temperature
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Amsterdam ,
Subject
Physics
Source (journal)
Physica: C: superconductivity. - Amsterdam
Volume/pages
503(2014) , p. 136-139
ISSN
0921-4534
ISI
000340070600028
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
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.
E-info
https://repository.uantwerpen.be/docman/iruaauth/bd96cc/cd38176.pdf
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Full text (open access)
https://repository.uantwerpen.be/docman/irua/dd2ce6/118744.pdf
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