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Flow-Induced Charge Modulation in Superfluid Atomic Fermions Loaded into an Optical Kagome Lattice
Daisuke Yamamoto, Chika Sato, Tetsuro Nikuni +1
We study the superfluid state of atomic fermions in a tunable optical kagome lattice motivated by recent experiments. We show that imposed superflow induces spatial modulations in…
Propagation of First and Second Sound in a Highly-Elongated Trapped Bose Condensed Gas at Finite temperatures
Emiko Arahat, Tetsuro Nikuni
We study sound propagation in Bose-condensed gases in a highly-elongated harmonic trap at finite temperatures. This problem is studied within the framework of Zaremba-Nikuni-Griffi…
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…