摘要
The effective action for spin-1 bosonic atom in an optical lattice is derived. The quasiparticle and quasihole dispersions are calculated for different cases by using a functional integral formalism. For all cases, the excitation spectra are analyzed. All the quasiparticle and quasihole excitations start with a gap.
基金
The project supported in part by National Natural Science Foundation of China under Grant Nos. 10547107, 10447125, and Doctoral Starting Fund from Southeast University under Grant No. 9207022244
