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Article overview
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Large Range of Stability of Larkin-Ovchinnikov States for Imbalanced Fermi Gases in Optical Lattices | Y. L. Loh
; N. Trivedi
; | Date: |
3 Jul 2009 | Abstract: | We show that Larkin-Ovchinnikov (LO) states with modulated superfluid order
parameters have a considerably larger range of stability in a lattice than in
the continuum. We obtain the phase diagram for the 3D cubic attractive Hubbard
model with an unequal population of up and down fermions using the
Bogoliubov-de Gennes fully self-consistent method. We find a strong modulation
of the local polarization that should provide a distinct signature for
detection of the LO phase. The shell structure in the presence of a trap
generates singularities in the density at the phase boundaries and provide
additional evidence for the LO phase. Depending on specific parameters, the LO
ground state occurs over a large range of population imbalance, involving 80%
of the atoms in the trap, and can exist up to an entropy s ~ 0.5 k_B per
fermion. | Source: | arXiv, 0907.0679 | Services: | Forum | Review | PDF | Favorites |
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