中国物理B ›› 2009, Vol. 18 ›› Issue (12): 5301-5307.doi: 10.1088/1674-1056/18/12/031
王永俊, 刘先锋, 韩玖荣
Wang Yong-Jun(王永俊), Liu Xian-Feng(刘先锋), and Han Jiu-Rong(韩玖荣)†
摘要: This paper studies the superfluidity of ultracold spin-2 Bose atoms with weak interactions in optical lattices by calculating the excitation energy spectrum using the Bogoliubov approach. The energy spectra exhibit the characteristics of the superfluid-phase explicitly and it finds the nonvanishing critical speeds of superfluid. The obtained results display that the critical speeds of superfluid are different for five spin components and can be controlled by adjusting the lattice parameters in experiments. Finally it discusses the feasibilities of implementing and measuring superfluid.
中图分类号: (Boson systems)