Van der Waals Interactions in a Magneto-Dielectric Medium

Details Van der Waals Interactions in a Magneto-Dielectric Medium Van der Waals Interactions in a Magneto-Dielectric Medium

2007-02-12

arxiv.org/abs/quant-ph/0702117v1

Phys. Rev. A 75, 052117 (2007)

Physics

Quantum Physics

9 pages, 1 figure

Scientific paper

10.1103/PhysRevA.75.052117

The van der Waals interaction between two ground-state atoms is calculated for two electrically or magnetically polarizable particles embedded in a dispersive magneto-dielectric medium. Unlike previous calculations which infer the atom-atom interaction from the dilute-medium limit of the macroscopic, many-body van der Waals interaction, the interaction is calculated directly for the system of two atoms in a magneto-dielectric medium. Two approaches are presented, the first based on the quantized electromagnetic field in a dispersive medium without absorption and the second on Green functions that allow for absorption. We show that the correct van der Waals interactions are obtained regardless of whether absorption in the host medium is taken into account.

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