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Machida, K Okayama University
Mizushima, T Okayama University
Ichioka, M Okayama University
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 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.
Digital Object Identifer:10.1103/PhysRevLett.97.120407
Published with permission from the copyright holder. This is the institute's copy, as published in Physical Review Letters, September 2006, Volume 97, Issue 12, Pages 4.
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Physical Review Letters
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