Joule-Thomson Coefficient for Strongly Interacting Unitary Fermi Gas

The Joule-Thomson effect reflects the interaction among constituent particles of macroscopic system. For classical ideal gas, the corresponding .Joule-Thomson coefficient is vanishing while it is non-zero for ideal quantum gas due to the quantum degeneracy. In recent years, much attention is paid to...

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Bibliographic Details
Published in:Communications in theoretical physics 2010-09, Vol.54 (9), p.489-494
Main Author: 廖恺 陈继胜 李超
Format: Article
Language:English
Subjects:
Thomson
强相互作用
焦耳-汤姆逊效应
理想气体
理想费米气体
理想量子气体
行为表现
量子简并
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Summary:The Joule-Thomson effect reflects the interaction among constituent particles of macroscopic system. For classical ideal gas, the corresponding .Joule-Thomson coefficient is vanishing while it is non-zero for ideal quantum gas due to the quantum degeneracy. In recent years, much attention is paid to the unitary Fermi gas with infinite two-body scattering length. According to universal analysis, the thermodynamical law of unitary Fermi gas is similar to that of non-interacting ideal gas, which can be explored by the virial theorem P = 2E/3V. Based on previous works, we further study the unitary Fermi gas properties. The effective chemical potential is introduced to characterize the nonlinear levels crossing effects in a strongly interacting medium. The changing behavior of the rescaled Joule-Thomson coefficient according to temperature manifests a quite different behavior from that for ideal Fermi gas.
ISSN:0253-6102
DOI:10.1088/0253-6102/54/3/22