Angular Fulde-Ferrell-Larkin-Ovchinnikov state in cold fermion gases in a toroidal trap
- Department of Physics, University of Tokyo, Tokyo 113-0033 (Japan) and Department of Physics, Niigata University, Niigata 950-2181 (Japan)
We study the angular Fulde-Ferrell-Larkin-Ovchinnikov (FFLO) state, in which the rotation symmetry is spontaneously broken, in population imbalanced fermion gases near the BCS-BEC crossover. We investigate the superfluid gases at low temperatures on the basis of the Bogoliubov-de Gennes equation and examine the stability against thermal fluctuations using the T-matrix approach beyond the local-density approximation. We find that the angular FFLO state is stabilized in the gases confined in the toroidal trap but not in the harmonic trap. The angular FFLO state is stable near the BCS-BEC crossover owing to the formation of pseudogap. Spatial dependences of number density and local population imbalance are shown for an experimental test.
- OSTI ID:
- 21287116
- Journal Information:
- Physical Review. B, Condensed Matter and Materials Physics, Vol. 80, Issue 22; Other Information: DOI: 10.1103/PhysRevB.80.220510; (c) 2009 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1098-0121
- Country of Publication:
- United States
- Language:
- English
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