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arXiv 1107.5129hep-th
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紧维下大质量费米子场的有限温度Casimir效应

Finite temperature Casimir effect of massive fermionic fields in the presence of compact dimensions

F. S. Khoo, L. P. Teo

摘要:

本文考虑了两个平行平板间大质量费米子场的有限温度Casimir效应,平板上有MIT袋边界条件。背景时空是$M^{p+1}\times T^q$,它的$q$维被紧化为环面。在紧致维上,假设场满足任意相位的周期性边界条件。明确地导出了Casimir自由能和力的高温和低温展开式。结果表明,作用在板上的Casimir力在任何温度下都是吸引力,而与紧环上的边界条件无关。本文还得到了Casimir力在小平板分离极限下的渐近极限。

英文摘要:

We consider the finite temperature Casimir effect of a massive fermionic field confined between two parallel plates, with MIT bag boundary conditions on the plates. The background spacetime is $M^{p+1}\times T^q$ which has $q$ dimensions compactified to a torus. On the compact dimensions, the field is assumed to satisfy periodicity boundary conditions with arbitrary phases. Both the high temperature and the low temperature expansions of the Casimir free energy and the force are derived explicitly. It is found that the Casimir force acting on the plates is always attractive at any temperature regardless of the boundary conditions assumed on the compact torus. The asymptotic limits of the Casimir force in the small plate separation limit are also obtained.

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