Wednesday, March 21, 2012

1203.4262 (Yongqiang Li et al.)

Anisotropic pair-superfluidity of trapped two-component Bose gases    [PDF]

Yongqiang Li, Liang He, Walter Hofstetter
We theoretically investigate the pair-superfluid phase of two-component ultracold gases with negative inter-species interactions in an optical lattice. We establish the phase diagram for filling $n=1$ at zero and finite temperature, by applying Bosonic Dynamical Mean-Field Theory, and confirm the stability of pair-superfluidity for asymmetric hopping of the two species. While the pair superfluid is found to be robust in the presence of a harmonic trap, we observe that it is destroyed already by a small population imbalance of the two species.
View original: http://arxiv.org/abs/1203.4262

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