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arXiv 0710.5249quant-ph
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波纹表面Casimir-Polder侧向力

Lateral Casimir-Polder force with corrugated surfaces

Diego A. R. Dalvit, Paulo A. Maia Neto, Astrid Lambrecht, Serge Reynaud

摘要:

我们导出了作用在波纹表面上的基态原子上的横向Casimir-Polder力,其振幅达到一阶。我们的计算是基于散射的方法,它考虑到非镜面反射和偏振混合的电磁量子涨落撞击实际材料。我们比较了我们的一阶精确结果与两种常用的近似方法。我们发现,邻近力近似(大波长)高估了横向力,而成对求和的方法低估了它由于色散力的非加性。我们认为,冷原子偶极横向振荡的频移测量可以提供一个引人注目的演示非平凡的几何效应的量子真空。

英文摘要:

We derive the lateral Casimir-Polder force on a ground state atom on top of a corrugated surface, up to first order in the corrugation amplitude. Our calculation is based on the scattering approach, which takes into account nonspecular reflections and polarization mixing for electromagnetic quantum fluctuations impinging on real materials. We compare our first order exact result with two commonly used approximation methods. We show that the proximity force approximation (large corrugation wavelengths) overestimates the lateral force, while the pairwise summation approach underestimates it due to the non-additivity of dispersion forces. We argue that a frequency shift measurement for the dipolar lateral oscillations of cold atoms could provide a striking demonstration of nontrivial geometrical effects on the quantum vacuum.

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