Abstract This paper analyzes the dispersion relation of the excitation mode in non-relativistic interacting fermion matter. The polarization tensor is calculated with the random phase approximation in terms of finite temperature field theory. With the polarization tensor, the influences of temperature,particle number density and interaction strength on the dispersion relation are discussed in detail. It finds that the collective effects are qualitatively more important in the unitary fermions than those in the finite contact interaction matter.
Received: 20 January 2008
Revised: 02 April 2008
Accepted manuscript online:
Fund: Project supported in
part by the Scientific Starting Research Fund of Central China
Normal University, National Natural Science Foundation of China
(Grant Nos 10675052 and 10875050) and MOE of China (Grant No IRT0624).
Cite this article:
Wang Yan-Ping (王艳萍), Chen Ji-Sheng (陈继胜) Dispersion relation of excitation mode in strongly interacting fermions matter 2008 Chin. Phys. B 17 4401
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