Nonextensive and extensive thermostatistic properties of Fermi systems trapped in different external potentials
Huang Zhi-Fu(黄志福)a), Ou Cong-Jie(欧聪杰)a)b), and Chen Jin-Can(陈金灿)a)†
a Department of Physics and Institute of Theoretical Physics and Astrophysics, Xiamen University, Xiamen 361005, China; b College of Information Science and Engineering, Huaqiao University, Quanzhou 362021, China
Abstract The thermostatistic properties of a q-generalized Fermi system trapped in a generic power-law potential are studied, based on the generalized statistic distribution derived from the Tsallis entropy. The total number of particles, the total energy, and the heat capacity at constant volume of the system are derived. The thermostatistic characteristics of the system are discussed in detail. It is found that the thermostatistic properties of such a system depend closely on parameter q, dimensional number of the space, kinetic characteristics of particles and shapes of the external potential, and the external potential has a great influence on the thermostatistic properties of the system. Moreover, it is shown that the results obtained here are very general and can be used to unify the description of the nonextensive and extensive thermostatistic properties of a class of Fermi systems trapped in different external potentials so that the important conclusions of many typical Fermi systems in the literature may be directly derived from the present paper.
Received: 20 November 2007
Revised: 26 November 2007
Accepted manuscript online:
Fund: Project supported
by the Research Foundation of Ministry of Education, China (Grant No
20050384005) and the Science Research Fund, Huaqiao University,
China (Grant No 07BS105).
Cite this article:
Huang Zhi-Fu(黄志福), Ou Cong-Jie(欧聪杰), and Chen Jin-Can(陈金灿) Nonextensive and extensive thermostatistic properties of Fermi systems trapped in different external potentials 2009 Chin. Phys. B 18 1380
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