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arXiv 1002.3936quant-phcond-mat.other
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正弦波纹表面间的横向Casimir力：不对称轮廓，与邻近力近似的偏差和与精确理论的比较

Lateral Casimir force between sinusoidally corrugated surfaces: Asymmetric profiles, deviations from the proximity force approximation and comparison with exact theory

H. -C. Chiu, G. L. Klimchitskaya, V. N. Marachevsky, V. M. Mostepanenko, U. Mohideen

备注：
56 pages, 13 figures; to appear in Phys. Rev. B
发表信息：
Phys. Rev. B, v.81, N11, p.115417-(1-20) (2010)
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摘要：

横向Casimir力，这之间出现的正弦波纹表面的球体和板，被测量的情况下，一个小的周期超出的邻近力近似的适用范围。球体和板上波纹幅度的增加允许观察到横向Casimir力的不对称性，即，它的轮廓偏离完美的正弦函数。在两组具有不同振幅的波纹的测量中，在不同的间隔处测量两个测试体上的波纹之间的相移上的侧向力的依赖性。在两个连续的实验中，还测量了作为分离函数的横向力的最大值。所有的测量数据进行了比较，使用的接近力近似的理论方法和精确的理论基础上的瑞利展开没有拟合参数。在这两种情况下，考虑了测试体的真实材料特性和非零温度。的数据被发现是在一个很好的协议与精确的理论，但偏离显着的接近力近似方法的预测。这提供了衍射型的影响，在PFA方法中被忽略的观察定量确认。横向卡西米尔力的现象在纳米技术的微机械操作的可能应用进行了讨论。

英文摘要：

The lateral Casimir force, which arises between aligned sinusoidally corrugated surfaces of a sphere and a plate, was measured for the case of a small corrugation period beyond the applicability region of the proximity force approximation. The increased amplitudes of the corrugations on both the sphere and the plate allowed observation of an asymmetry of the lateral Casimir force, i.e., deviation of its profile from a perfect sine function. The dependences of the lateral force on the phase shift between the corrugations on both test bodies were measured at different separations in two sets of measurements with different amplitudes of corrugations on the sphere. The maximum magnitude of the lateral force as a function of separation was also measured in two successive experiments. All measurement data were compared with the theoretical approach using the proximity force approximation and with the exact theory based on Rayleigh expansions with no fitting parameters. In both cases real material properties of the test bodies and nonzero temperature were taken into account. The data were found to be in a good agreement with the exact theory but deviate significantly from the predictions of the proximity force approximation approach. This provides the quantitative confirmation for the observation of diffraction-type effects that are disregarded within the PFA approach. Possible applications of the phenomenon of the lateral Casimir force in nanotechnology for the operation of micromachines are discussed.

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