32 citations · 53 across the 5 of their papers we have counts for
5 papers
Elementary excitations of antiferromagnetic spin-1 bosons in an optical lattice
Misako Shinozaki, Shunji Tsuchiya, Shumpei Abe +2
We study elementary excitations of spin-1 bosons with antiferromagnetic interaction in an optical lattice by applying the Gutzwiller approximation to the spin-1 Bose-Hubbard model.…
First-order phase transition and anomalous hysteresis of Bose gases in optical lattices
Daisuke Yamamoto, Takeshi Ozaki, Carlos A. R. Sá de Melo +1
We study the first-order quantum phase transitions of Bose gases in optical lattices. A special emphasis is placed on an anomalous hysteresis behavior, in which the phase transitio…
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…
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…
Phase Separation in Bose-Bose Mixtures in an Optical Lattice
Takeshi Ozaki, Tetsuro Nikuni
We study the ground-state properties of mixtures of strongly interacting bosonic atoms in an optical lattice. Applying a mean-field approximation to the Hubbard model for Bose-Bose…