Dispersion relation of excitation mode in spin-polarized Fermi gas  

作　　者：刘可 陈继胜 

机构地区：[1]Department of Physics and Institute of Particle Physics,Central China Normal University

出　　处：《Chinese Physics B》2012年第3期80-84,共5页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China (Grant No. 10875050 and 11178001)

摘　　要：We study the dispersion relation of the excitation mode in a spin-polarized Fermi gas. In the frame of the imaginarytime finite temperature field theory, the polarization tensor is calculated by taking the random phase approximation. The population imbalance effects on the dispersion relation of the excitation mode and the spin-spin correlation susceptibility are investigated. The numerical results in terms of the imbalance ratio indicate the polarization effects on the dispersion relation and susceptibility X.We study the dispersion relation of the excitation mode in a spin-polarized Fermi gas. In the frame of the imaginarytime finite temperature field theory, the polarization tensor is calculated by taking the random phase approximation. The population imbalance effects on the dispersion relation of the excitation mode and the spin-spin correlation susceptibility are investigated. The numerical results in terms of the imbalance ratio indicate the polarization effects on the dispersion relation and susceptibility X.

关 键 词：dispersion relation polarized fermions polarization tensor 

分 类 号：O562[理学—原子与分子物理]