Dispersion relation of excitation mode in spin-polarized Fermi gas

doi:10.1088/1674-1056/21/3/030309

Abstract We study the dispersion relation of the excitation mode in a spin-polarized Fermi gas. In the frame of the imaginary-time 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 $\chi$.

Keywords: dispersion relation polarized fermions polarization tensor

Received: 04 August 2011
Revised: 09 October 2011
Accepted manuscript online:

PACS:	03.75.Ss	(Degenerate Fermi gases)
	05.30.Fk	(Fermion systems and electron gas)
	67.85.Lm	(Degenerate Fermi gases)

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

Corresponding Authors: Liu Ke,liuke@phy.ccnu.edu.cn
E-mail: liuke@phy.ccnu.edu.cn

Cite this article:

Liu Ke(刘可) and Chen Ji-Sheng(陈继胜) Dispersion relation of excitation mode in spin-polarized Fermi gas 2012 Chin. Phys. B 21 030309

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