Phase Transitions in Three-Dimensional Bosonic Optical Lattices [PDF]
H. Kleinert, Z. Narzikulov, Abdulla RakhimovWe develop the Collective Quantum Field Theory of D=3 optical bosonic cubic lattices and evaluate consequences at the mean-field level and in Variational Perturbation Theory (VPT). In contrast to a recent prediction for atomic gases by Cooper et. al. we find no superfluid state with zero condensate fraction.View original: http://arxiv.org/abs/1303.1642
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