Possibility of a first-order superfluid-Mott-insulator transition of spinor bosons in an optical lattice.
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 variational 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.
Kimura
Takashi
T
Department of Information Sciences, Kanagawa University, 2946 Tsuchiya, Hiratsuka, Kanagawa 259-1293, Japan.
Tsuchiya
Shunji
S
Kurihara
Susumu
S