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arXiv 0905.1046quant-ph
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任意几何形状电介质间的Casimir-Lifshitz相互作用:电介质对比微扰理论

Casimir-Lifshitz Interaction between Dielectrics of Arbitrary Geometry: A Dielectric Contrast Perturbation Theory

Ramin Golestanian

摘要:

Dzyaloshinskii、Lifshitz和Pitaevskii提出的电介质中电磁涨落感应相互作用的一般理论,根据(虚)频相关介电函数的空间对比,被改写为微扰理论。该公式可用于计算任意几何形状的电介质物体的Casimir-Lifshitz力,作为电介质对比度的微扰展开,因此可以补充现有的使用几何特征微扰的理论。我们发现,在介电对比度的膨胀重铸所产生的Lifshitz能量到不同的多体贡献的总和。的摄动理论的有效性和收敛性的限制进行了讨论,使用的例子,平行的半无限对象的确切结果是已知的。

英文摘要:

The general theory of electromagnetic--fluctuation--induced interactions in dielectric bodies as formulated by Dzyaloshinskii, Lifshitz, and Pitaevskii is rewritten as a perturbation theory in terms of the spatial contrast in (imaginary) frequency dependent dielectric function. The formulation can be used to calculate the Casimir-Lifshitz forces for dielectric objects of arbitrary geometry, as a perturbative expansion in the dielectric contrast, and could thus complement the existing theories that use perturbation in geometrical features. We find that expansion in dielectric contrast recasts the resulting Lifshitz energy into a sum of the different many-body contributions. The limit of validity and convergence properties of the perturbation theory is discussed using the example of parallel semi-infinite objects for which the exact result is known.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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