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cond-mat.quant-gas2012★ 4 cited
Bose-Bose mixtures in an optical lattice: First-order superfluid-insulator transition and elementary excitations
Takeshi Ozaki, Ippei Danshita, Tetsuro Nikuni
We study ground-state phase diagrams and excitation spectra of Bose-Bose mixtures in an optical lattice by applying the Gutzwiller approximation to the two-component Bose-Hubbard m…
cond-mat.quant-gas2012★ 13 cited
Detecting the superfluid critical momentum of Bose gases in optical lattices through dipole oscillations
Takuya Saito, Ippei Danshita, Takeshi Ozaki +1
We study stability of superflow of Bose gases in optical lattices by analyzing the Bose-Hubbard model within the Gutzwiller mean-field approximation. We calculate the excitation sp…