Casimir-Polder interaction between an atom and a small magnetodielectric sphere

被引:14
作者
Sambale, Agnes [1 ]
Buhmann, Stefan Yoshi [2 ]
Scheel, Stefan [2 ]
机构
[1] Univ Jena, Inst Theoret Phys, D-07743 Jena, Germany
[2] Univ London Imperial Coll Sci Technol & Med, Blackett Lab, London SW7 2BW, England
来源
PHYSICAL REVIEW A | 2010年 / 81卷 / 01期
基金
英国工程与自然科学研究理事会;
关键词
MACROSCOPIC QUANTUM ELECTRODYNAMICS; DISPERSION FORCES; VANDERWAALS FORCES; PARTICLES; LIQUIDS; SYSTEMS; BODIES;
D O I
10.1103/PhysRevA.81.012509
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
On the basis of macroscopic quantum electrodynamics and point-scattering techniques, we derive a closed expression for the Casimir-Polder force between a ground-state atom and a small magnetodielectric sphere in an arbitrary environment. To allow for the presence of both bodies and media, local-field corrections are taken into account. Our results are compared with the known van der Waals force between two ground-state atoms. To continuously interpolate between the two extreme cases of a single atom and a macroscopic sphere, we also derive the force between an atom and a sphere of variable radius that is embedded in an Onsager local-field cavity. Numerical examples illustrate the theory.
引用
收藏
页数:9
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