J. E. Baarsma, H. T. C. Stoof
We have determined the complete phase diagram of the Li-6-K-40 mixture within mean-field theory taking the inhomogeneities of the fermion states into account exactly. We find two different inhomogeneous superfluid phases in mixtures with a majority of K-40 atoms, namely the Larkin-Ovchinnikov (LO-1) phase with one inhomogeneous direction and a cubic phase (LO-3) where three spatial translational symmetries are broken. We determine the transition between these two phases by solving the Bogoliubov-de Gennes equations in the LO-1 phase. Subsequently, we calculate the atomic density modulation of the atoms in the LO-1 phase and show that it is sufficiently large to be visible in experiment.
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http://arxiv.org/abs/1212.5450
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