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First-order superfluid-Mott insulator transition of spinor bosons in an optical lattice

Takashi Kimura·Shunji Tsuchiya·Susumu Kurihara
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Abstract

We study the superfluid-Mott insulator transition of antiferromagnetic spin-1 bosons in an optical lattice described by a Bose-Hubbard model. Our variational study with the Gutzwiller-type trial wave function determines that the superfluid-Mott insulator transition is a first-order one at a part of the phase boundary curve, contrary to the spinless case. This first-order transition may be observed through an experiment, such as a Stern-Gerlach type, under a magnetic field.

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Takashi Kimura, Shunji Tsuchiya, Susumu Kurihara. 2004-08-01. First-order superfluid-Mott insulator transition of spinor bosons in an optical lattice. https://doi.org/10.1103/physrevlett.94.110403

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