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arXiv 0907.5258hep-th
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额外维时空中Robin边界条件下标量场的有限温度Casimir效应

Finite temperature Casimir effect for scalar field with Robin boundary conditions in spacetime with extra dimensions

L. P. Teo

摘要:

本文研究了具有任意几何形状紧致内部流形的背景时空中两平行平板上具有Robin边界条件的标量场的有限温度Casimir效应。用活塞法导出了作用在板上的有限温度Casimir力,证明了Casimir力在板间区域和板外区域的发散是相互抵消的。详细研究了在不同的极限条件下,如小、大板分离、低温和高温下Casimir力的性质和渐近行为。确定了Casimir力总是吸引力或总是排斥力的Robin系数的范围。也有一些范围的罗宾系数,Casimir力被证明是吸引力在小板分离和排斥在大板分离,反之亦然。

英文摘要:

In this article, we study the finite temperature Casimir effect for scalar field with Robin boundary conditions on two parallel plates in a background spacetime that has a compact internal manifold with arbitrary geometry. The finite temperature Casimir force acting on the plates is derived using the piston approach, with which we show that the divergences of the Casimir forces from the region between the plates and the region outside the plates cancel each other. The nature and asymptotic behaviors of the Casimir force at different limits such as small and large plate separation, low and high temperature, are studied in detail. The range of Robin coefficients where the Casimir force are always attractive or always repulsive are determined. There are also some range of the Robin coefficients where the Casimir force is shown to be attractive at small plate separation and repulsive at large plate separation, or vise versa.

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