EXPERIMENTAL DETECTION OF TRANSITION OF He$sup 3$ TO THE SUPERFLUID PHASE

J. Mayers, F. Albergamo, David N. Timms

Myron Wyn Evans

L. V. Levitin, Robert G. Bennett, Andrew J. Casey +7 more

J.-Q. Liang, J.-Q. Liang, W.-M. Liu

Green function metheod is introduced to investigate ultracold dilute gas of bosonic atoms in an optical lattice which can be described by a Bose–Hubbard model. The superfluid–Mott insulator phase transition condition is determined by the related energy-band structure with an obvious interpretation of the transition mechanism.

Qiuyan Li, Zhengwei Xie, Zai-Dong Li

In terms of the Green's function method we study the energy spectrum of dipolar boson atoms with the dipole-dipole interaction in an optical lattice. The Superfluid-Mott-Insulator phase transition condition of the dipolar bosons is determined from the energy-band structure of the excitation spectrum as a function of interatomic repulsion, dipolar bosons interaction and the tunnel coupling constants. The superfluid phase is explained explicitly from the energy spectrum derived in terms of the Bogoliubov approach as well.

Mark C. Williams, Keith A. Lidke, Clayton F. Giese +1 more