Oscillating Casimir force between two slabs in a Fermi sea

作     者：Chen Li-Wei Su Guo-zhen Chen Jin-can Andresen Bjarne 陈礼炜;苏国珍;陈金灿;Andresen Bjarne

作者机构：Department of Physics and Institute of Theoretical Physics and AstrophysicsXiamen UniversityXiamen 361005China Niels Bohr InstituteUniversity of CopenhagenUniversitetsparken 5DK-2100 Copenhagen∅Denmark 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2012年第21卷第1期

页      面：110-114页

核心收录：

学科分类：07[理学] 070401[理学-天体物理] 0704[理学-天文学] 

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.10875100) the Natural Science Foundationof Fujian Province,China(Grant No.A1010016) 

主　　题：Casimir effect Fermi gas parallel slab oscillation 

摘      要：The Casimir effect for two parallel slabs immersed in an ideal Fermi sea is investigated at both zero and nonzero temperatures. It is found that the Casimir effect in a Fermi gas is distinctly different from that in an electromagnetic field or a massive Bose gas. In contrast to the familiar result that the Casimir force decreases monotonically with the increase of the separation L between two slabs in an electromagnetic field and a massive Bose gas, the Casimir force in a Fermi gas oscillates as a function of L. The Casimir force can be either attractive or repulsive, depending sensitively on the magnitude of L. In addition, it is found that the amplitude of the Casimir force in a Fermi gas decreases with the increase of the temperature, which also is contrary to the case in a Bose gas, since the bosonic Casimir force increases linearly with the increase of the temperature in the region T 〈 Tc, where Tc is the critical temperature of the Bose Einstein condensation.