Phase boundary of the boson Mott insulator in a rotating optical lattice
Phase boundary of the boson Mott insulator in a rotating optical lattice
We consider the Bose-Hubbard model in a two-dimensional rotating optical lattice and investigate the consequences of the effective magnetic field created by rotation. Using a Gutzwiller-type variational wave function, we find an analytical expression for the Mott insulator (MI)--superfluid (SF) transition boundary in terms of the maximum eigenvalue of the …