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arXiv · 1309.7449

Superfluid phases of spin-1 bosons in cubic optical lattice

Mohamed Mobarak·Axel Pelster
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Abstract

We analyze theoretically the emergence of different superfluid phases of spin-1 bosons in a three-dimensional cubic optical lattice by generalizing the recently developed Ginzburg-Landau theory for the Bose-Hubbard model to a spinor Bose gas. In particular at zero temperature, our theory distinguishes within its validity range between various superfluid phases for an anti-ferromagnetic interaction with an external magnetic field. In addition, we determine that the superfluid-Mott insulator phase transition is of second order and that the transitions between the respective superfluid phases with anti-ferromagnetic interaction can be both of first and second order.

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Mohamed Mobarak, Axel Pelster. 2013-10-26. Superfluid phases of spin-1 bosons in cubic optical lattice. https://doi.org/10.1088/1612-2011%2F10%2F11%2F115501

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