Stability of supercurrents in a superfluid phase of spin-1 bosons in an optical lattice
Stability of supercurrents in a superfluid phase of spin-1 bosons in an optical lattice
We study collective modes and superfluidity of spin-1 bosons with antiferromagnetic interactions in an optical lattice based on the time-dependent Ginzburg-Landau (TDGL) equation derived from the spin-1 Bose-Hubbard model. Specifically, we examine the stability of supercurrents in the polar phase in the vicinity of the Mott insulating phase with even …