Pressure and Spectral Density of Fermions at Finite Temperature
HOU De-fu1,2 , U. Heinz2 , LI Jia-rong1
1 Institute of Particle Physics, Huazhong Normal University, Wuhan 430079
2 Institut fiir Theoretische Physik, Universitat Regensburg, D-93040 Regensburg, Germany
Pressure and Spectral Density of Fermions at Finite Temperature
HOU De-fu1,2 ;U. Heinz2 ;LI Jia-rong1
1 Institute of Particle Physics, Huazhong Normal University, Wuhan 430079
2 Institut fiir Theoretische Physik, Universitat Regensburg, D-93040 Regensburg, Germany
关键词 ：
11.10.Wx ,
12.38.Cy ,
12.38.Mh
Abstract ： The pressure of a fermion system is expressed as a mass integral over the full two-point spectral densities within the real time formalism by use of the Keldysh representation for the propagators. This simplifies the calculation significantly and allows a Dyson resummation. The expression is used to demonstrate that potential infrared divergences are rendered harmless. We apply it to check the pressures of an ideal fermion gas and of a chemically non-equilibrated quantum chromodynamics plasma.
Key words ：
11.10.Wx
12.38.Cy
12.38.Mh
出版日期: 1999-10-01
引用本文:
HOU De-fu;U. Heinz;LI Jia-rong. Pressure and Spectral Density of Fermions at Finite Temperature[J]. 中国物理快报, 1999, 16(10): 709-711.
链接本文:
https://cpl.iphy.ac.cn/CN/
或
https://cpl.iphy.ac.cn/CN/Y1999/V16/I10/709
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1999, Vol. 16 
