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arXiv 1003.0430hep-thcond-mat.stat-mechquant-ph
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几何-温度相互作用下的非单调热Casimir力

Non-monotonic thermal Casimir force from geometry-temperature interplay

Alexej Weber, Holger Gies

摘要:

Casimir力的几何形状依赖性是显着更明显的热波动的存在下,由于一个通用的几何形状-温度的相互作用。我们表明,标准的球板或圆柱板的几何形状的热力发展的非单调行为已经在一个简单的情况下波动的狄利克雷标量。特别地,对于低于临界温度的增加的距离,热吸引力可以增加。这种异常行为是由热波长尺度上的相关波动的重新加权触发的。这种现象的本质在卡西米尔效应的世界线图像中变得透明。

英文摘要:

The geometry dependence of Casimir forces is significantly more pronounced in the presence of thermal fluctuations due to a generic geometry-temperature interplay. We show that the thermal force for standard sphere-plate or cylinder-plate geometries develops a non-monotonic behavior already in the simple case of a fluctuating Dirichlet scalar. In particular, the attractive thermal force can increase for increasing distances below a critical temperature. This anomalous behavior is triggered by a reweighting of relevant fluctuations on the scale of the thermal wavelength. The essence of the phenomenon becomes transparent within the worldline picture of the Casimir effect.

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