Thermal Casimir Effect in the Plane-Sphere Geometry
Thermal Casimir Effect in the Plane-Sphere Geometry
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DOI：
10.1103/physrevlett.104.040403
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发表时间：
2010-01-29
影响因子：
8.6
通讯作者：
Reynaud, Serge
中科院分区：
文献类型：
--
作者：
Canaguier-Durand, Antoine;Maia Neto, Paulo A.;Reynaud, Serge
已知两金属板之间的热Casimir力依赖于材料性质的描述。对于大的分离的耗散德鲁德模型导致的力的一个因素2小于无损等离子体模型。在这里，我们表明，平面球的几何形状，在目前的实验进行，减少这个比例的3/2的一个因素，所揭示的精确的数值和大距离的分析计算。对于完美的反射体，我们发现在中间距离的力和负熵值的热光子的排斥性的贡献。
The thermal Casimir force between two metallic plates is known to depend on the description of material properties. For large separations the dissipative Drude model leads to a force a factor of 2 smaller than the lossless plasma model. Here we show that the plane-sphere geometry, in which current experiments are performed, decreases this ratio to a factor of 3/2, as revealed by exact numerical and large-distance analytical calculations. For perfect reflectors, we find a repulsive contribution of thermal photons to the force and negative entropy values at intermediate distances.