Publication
Title
Finite-temperature vortices in a rotating Fermi gas
Author
Abstract
Vortices and vortex arrays have been used as a hallmark of superfluidity in rotated, ultracold Fermi gases. These superfluids can be described in terms of an effective field theory for a macroscopic wave function representing the field of condensed pairs, analogous to the Ginzburg-Landau theory for superconductors. Here we establish how rotation modifies this effective field theory, by rederiving it starting from the action of Fermi gas in the rotating frame of reference. The rotation leads to the appearance of an effective vector potential, and the coupling strength of this vector potential to the macroscopic wave function depends on the interaction strength between the fermions, due to a renormalization of the pair effective mass in the effective field theory. The mass renormalization derived here is in agreement with results of functional renormalization-group theory. In the extreme Bose-Einstein condensate regime, the pair effective mass tends to twice the fermion mass, in agreement with the physical picture of a weakly interacting Bose gas of molecular pairs. Then we use our macroscopic-wave-function description to study vortices and the critical rotation frequencies to form them. Equilibrium vortex state diagrams are derived and they are in good agreement with available results of the Bogoliubov-de Gennes theory and with experimental data.
Language
English
Source (journal)
Physical review A / American Physical Society. - New York, N.Y., 2016, currens
Publication
New York, N.Y. : American Physical Society, 2016
ISSN
2469-9934
Volume/pages
94:2(2016), 13 p.
Article Reference
023620
ISI
000381473100001
Medium
E-only publicatie
Full text (Publisher's DOI)
Full text (open access)
UAntwerpen
Faculty/Department
Research group
[E?say:metaLocaldata.cgzprojectinf]
Quantum turbulence in atomic and solid state Bose-Einstein condensates.
Quantum simulation of polaronic effects in quantum gases.
Nonlinear Transport of the Wigner Solid on a Superfluid 4He in a Quasi-One- Dimensional Channel.
Superfluidity and superconductivity in multicomponent quantum condensates.
Matching the functional properties of nanoparticles and nanowires.
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 06.10.2016
Last edited 17.10.2017
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