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arXiv 0812.0426hep-th
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零温和有限温下的排斥Casimir力

Repulsive Casimir force at zero and finite temperature

S. C. Lim, L. P. Teo

摘要:

本文研究了零温和有限温Casimir力作用在任意截面的理想导电活塞上,活塞在具有无限透水壁的封闭圆柱体中运动。我们表明,在任何温度下,卡西米尔力总是倾向于移动活塞远离壁和其平衡位置。在矩形活塞的情况下,导出了Casimir力的精确表达式.在高温区,我们表明,卡西米尔力的主导项是线性的温度,因此卡西米尔力有一个经典的极限。由于对偶性,所有这些结果也适用于在具有完全导电壁的封闭圆柱体内移动的无限渗透活塞。

英文摘要:

We study the zero and finite temperature Casimir force acting on a perfectly conducting piston with arbitrary cross section moving inside a closed cylinder with infinitely permeable walls. We show that at any temperature, the Casimir force always tends to move the piston away from the walls and towards its equilibrium position. In the case of rectangular piston, exact expressions for the Casimir force are derived. In the high temperature regime, we show that the leading term of the Casimir force is linear in temperature and therefore the Casimir force has a classical limit. Due to duality, all these result also hold for an infinitely permeable piston moving inside a closed cylinder with perfectly conducting walls.

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