Thermal Casimir versus Casimir-Polder forces: Equilibrium and nonequilibrium forces

被引：96

作者：

Buhmann, Stefan Yoshi ^{[1
]}

Scheel, Stefan ^{[1
]}

机构：

[1] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2AZ, England

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 100卷 / 25期

基金：

英国工程与自然科学研究理事会;

关键词：

D O I：

10.1103/PhysRevLett.100.253201

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We critically discuss whether and under what conditions Lifshitz theory may be used to describe thermal Casimir-Polder forces on atoms or molecules. An exact treatment of the atom-field coupling reveals that for a ground-state atom (molecule), terms associated with virtual-photon absorption lead to a deviation from the traditional Lifshitz result; they are identified as a signature of nonequilibrium dynamics. Even the equilibrium force on a thermalized atom (molecule) may be overestimated when using the ground-state polarizability instead of its thermal counterpart.

引用

页数：4

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