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Damping of Condensate Oscillation of a Trapped Bose Gas in a One-Dimensional Optical Lattice at Finite Temperatures
Emiko Arahata, Tetsuro Nikuni
We study damping of a dipole oscillation in a Bose-Condensed gas in a combined cigar-shaped harmonic trap and one-dimensional (1D) optical lattice potential at finite temperatures.…
Spin dynamics of a trapped spin-1 Bose Gas above the Bose-Einstein transition temperature
Yuki Endo, Tetsuro Nikuni
We study collective spin oscillations in a spin-1 Bose gas above the Bose-Einstein transition temperature. Starting from the Heisenberg equation of motion, we derive a kinetic equa…
Conversion Efficiencies of Heteronuclear Feshbach Molecules
Shohei Watabe, Tetsuro Nikuni
We study the conversion efficiency of heteronuclear Feshbach molecules in population imbalanced atomic gases formed by ramping the magnetic field adiabatically. We extend the recen…
Coarse-Grained Finite-Temperature Theory for the Condensate in Optical Lattices
Satoru Konabe, Tetsuro Nikuni
In this work, we derive a coarse-grained finite-temperature theory for a Bose condensate in a one-dimensional optical lattice, in addition to a confining harmonic trap potential. W…
Vortex Lattice Structures of a Bose-Einstein Condensate in a Rotating Triangular Lattice Potential
T. Sato, T. Ishiyama, T. Nikuni
We study the vortex pinning effect in a Bose-Einstein Condensate in the presence of a rotating lattice potential by numerically solving the time-dependent Gross-Pitaevskii equation…