Localized Higgs modes of superfluid Bose gases in optical lattices: A Gutzwiller mean-field study
Localized Higgs modes of superfluid Bose gases in optical lattices: A Gutzwiller mean-field study
We study effects of a potential barrier on collective modes of superfluid Bose gases in optical lattices. We assume that the barrier is created by local suppression of the hopping amplitude. When the system is in a close vicinity of the Mott transition at commensurate fillings, where an approximate particle-hole …