超流费米原子气体的动力学自旋结构因子的研究  

Spin Responses of a Superfluid Fermi Gas of Atoms

作　　者：葛梅[1] 

机构地区：[1]山西师范大学物理与信息工程学院,山西临汾041004

出　　处：《山西师范大学学报（自然科学版）》2009年第1期71-74,共4页Journal of Shanxi Normal University(Natural Science Edition)

摘　　要：主要计算了处于Bose-Einstein-Condensation-Bardeen-Cooper-Schrieffer(BEC-BCS)过渡区的超流费米原子气体的动力学自旋结构因子,并研究了它与频率的依赖关系.发现当波矢q处于(0.05kF,kF)范围内时,在小于超流能隙值的频率范围内动力学自旋结构因子会呈现一个峰.我们认为这个峰是由超流能隙下的自旋激发造成的.The dynamic spin structure factor of a superfluid Fermi gas of atoms in the BEC-BCS crossover regime has been calculated and its dependence on the frequency has been studied. The result shows that the dynamic spin structure factor possesses a peak at a fixed frequency below the superfluid gap for wavevectors in the range from 0. 05kF to kF with kF the Fermi wavevector. The peak is attributed to the spin excitons below the superfluid gap.

关 键 词：超流费米原子气体 超流能隙 动力学自旋结构因子 

分 类 号：O469[理学—凝聚态物理]