Singh, M.; Dhar, Arya; Mishra, T.; Pai, R.V.; Das, B.P.
(Physical Review A. 85(5); 2012; Article ID: 051604(R).)
The Mott-insulator-superfluid transition for ultracold bosonic atoms in an optical lattice has been extensively studied in the framework of the Bose-Hubbard model with two-body on-site interactions. We analyze the additional ...