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arXiv 0912.4047quant-ph
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有限温度下球与平面间的真空能

Vacuum energy between a sphere and a plane at finite temperature

M. Bordag, I. Pirozhenko

摘要:

我们考虑了在有限温度下,在标量场和电磁场的平面前的球的Casimir效应,并计算了极限情况。对于小的分离,我们比较的精确结果与邻近力近似得到相应的。对于具有Dirichlet边界条件的标量场,低温修正是平行平面的类$T^2$阶。对于电磁场,它的阶数为$T^4$。对于高温,我们观察到通常的图片,领先的订单是由零松原频率。非零频率被指数抑制,除了紧密分离的情况。

英文摘要:

We consider the Casimir effect for a sphere in front of a plane at finite temperature for scalar and electromagnetic fields and calculate the limiting cases. For small separation we compare the exact results with the corresponding ones obtained in proximity force approximation. For the scalar field with Dirichlet boundary conditions, the low temperature correction is of order $T^2$ like for parallel planes. For the electromagnetic field it is of order $T^4$. For high temperature we observe the usual picture that the leading order is given by the zeroth Matsubara frequency. The non-zero frequencies are exponentially suppressed except for the case of close separation.

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