Comment on “Anomalies in electrostatic calibrations for the measurement of the Casimir force in a sphere-plane geometry”
Comment on “Anomalies in electrostatic calibrations for the measurement of the Casimir force in a sphere-plane geometry”
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对“球面几何中卡西米尔力测量的静电校准中的异常”的评论
DOI：
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发表时间：
2008
期刊：
影响因子：
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通讯作者：
V. Mostepanenko
中科院分区：
文献类型：
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作者：
R. Decca;E. Fischbach;G. L. Klimchitskaya;D. Krause;D. Krause;D. López;U. Mohideen;V. Mostepanenko
最近，Kim等人[Phys. Rev. A 78，020101（R）（2008）]对厘米级球形透镜上方的平板进行了静电校准，分离度低至20 char 21 {}30 nm，并观察到"异常行为“。“人们发现，静电力的梯度并不依赖于分离的基础上预测的纯库仑贡献。一些假设，可能会解释偏离预期的行为被认为是，有利于补丁表面电位的影响的定性参数。我们证明，对于大透镜在几十纳米的板分离，静电力法由作者使用的是不适用的，由于可能的偏差的机械抛光和地面透镜表面从一个完美的球形。提出了一个模型，它提供了一个可能的解释所观察到的异常行为，使用标准库仑力。
Recently Kim et al. [Phys. Rev. A 78, 020101(R) (2008)] performed electrostatic calibrations for a plane plate above a centimeter-size spherical lens at separations down to 20char21{}30 nm and observed ``anomalous behavior.' It was found that the gradient of the electrostatic force does not depend on separation as predicted on the basis of a pure Coulomb contribution. Some hypotheses which could potentially explain the deviation from the expected behavior were considered, and qualitative arguments in favor of the influence of patch surface potentials were presented. We demonstrate that for the large lenses at separations of a few tens of nanometers from the plate, the electrostatic force law used by the authors is not applicable due to possible deviations of the mechanically polished and ground lens surface from a perfect spherical shape. A model is proposed which provides a possible explanation for the observed anomalous behavior using the standard Coulomb force.