Temperature-independent Casimir-Polder forces in arbitrary geometries
Temperature-independent Casimir-Polder forces in arbitrary geometries
复制标题
任意几何形状中与温度无关的卡西米尔-波尔德力
DOI：
10.1103/physreva.84.060501
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发表时间：
2011
影响因子：
2.9
通讯作者：
S. Scheel
中科院分区：
文献类型：
--
作者：
S. Ellingsen;S. Buhmann;S. Scheel
我们证明了一个处于能量本态的粒子的非迟滞卡西米尔-波德势（即处于热非平衡态）与任意形状的良好导体的环境温度无关。即使在相关原子跃迁能处的热光子数很大时也是如此。得到了与温度无关的势的紧凑表达式，可以大大简化实验相关体系（如里德伯原子和极性分子）的非平凡几何计算。我们给出了与温度无关的结果的有效性准则，并推导了其主要修正的一般表达式。它们由靠近金球或在金圆柱腔内的粒子的数值研究来说明。
We prove that the nonretarded Casimir-Polder potential of a particle in an energy eigenstate (hence in thermal nonequilibrium) is independent of the environment temperature for a well-conducting body of arbitrary shape. This is true even when the thermal photon numbers at the relevant atomic transition energies are large. A compact expression is obtained for the temperature-independent potential, which can greatly simplify calculations in nontrivial geometries for experimentally relevant systems such as Rydberg atoms and polar molecules. We give criteria for the validity of our temperature-independent result and derive general expressions for its leading corrections. They are illustrated by numerical studies of a particle near a gold sphere or inside a gold cylindrical cavity.