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arXiv quant-ph/9903086quant-phcond-mathep-th
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球形电介质的Casimir问题:量子统计力学解

The Casimir Problem of Spherical Dielectrics: A Solution in Terms of Quantum Statistical Mechanics

J. S. Høye, I. Brevik

摘要:

利用H \oye - Stell等人提出的量子统计方法,以一种新的方式研究了致密介质球的Casimir能量.假设培养基稀释。事实证明,这种方法是一种非常强大的方法:我们实际上能够推导出卡西米尔能量的表达式,其中还包含由分子之间的范德华力吸引力产生的负部分。当对连续介质使用传统场论方法时,恰恰是卡西米尔能量的这一部分被证明是如此难以从形式主义中提取。假设频率截止,我们的结果与Barton最近获得的结果一致[J. Phys. A:Math. Gen. 32(1999)525]。

英文摘要:

The Casimir energy for a compact dielectric sphere is considered in a novel way, using the quantum statistical method introduced by H\oye - Stell and others. Dilute media are assumed. It turns out that this method is a very powerful one: we are actually able to derive an expression for the Casimir energy that contains also the negative part resulting from the attractive van der Waals forces between the molecules. It is precisely this part of the Casimir energy that has turned out to be so difficult to extract from the formalism when using the conventional field theoretical methods for a continuous medium. Assuming a frequency cutoff, our results are in agreement with those recently obtained by Barton [J. Phys. A: Math. Gen. 32(1999)525].

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