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Generic phase diagram of Fermion superfluids with population imbalance.

Authors :
Machida K
Mizushima T
Ichioka M
Source :
Physical review letters [Phys Rev Lett] 2006 Sep 22; Vol. 97 (12), pp. 120407. Date of Electronic Publication: 2006 Sep 21.
Publication Year :
2006

Abstract

It is shown by microscopic calculations for trapped imbalanced Fermi superfluids that the gap function always has sign changes, i.e., the Fulde-Ferrell-Larkin-Ovchinnikov (FFLO)-like state, up to a critical imbalance P(c), beyond which normal state becomes stable, at temperature T=0. A temperature-versus-pressure phase diagram is constructed, where the BCS state without sign change is stable only at T not equal to 0. We reproduce the observed bimodality in the density profile to identify its origin and evaluate P(c) as functions of T and the coupling strength. These dependencies match with the recent experiments.

Details

Language :
English
ISSN :
0031-9007
Volume :
97
Issue :
12
Database :
MEDLINE
Journal :
Physical review letters
Publication Type :
Academic Journal
Accession number :
17025946
Full Text :
https://doi.org/10.1103/PhysRevLett.97.120407