Atomic decay near a quantized medium of absorbing scatterers

Details Atomic decay near a quantized medium of absorbing scatterers Atomic decay near a quantized medium of absorbing scatterers

2010-04-26

arxiv.org/abs/1004.4479v1

Physics

Quantum Physics

20 pages, 1 figure

Scientific paper

The decay of an excited atom in the presence of a medium that both scatters and absorbs radiation is studied with the help of a quantum-electrodynamical model. The medium is represented by a half space filled with a randomly distributed set of non-overlapping spheres, which consist of a linear absorptive dielectric material. The absorption effects are described by means of a quantized damped-polariton theory. It is found that the effective susceptibility of the bulk does not fully account for the medium-induced change in the atomic decay rate. In fact, surface effects contribute to the modification of the decay properties as well. The interplay of scattering and absorption in the total decay rate is discussed.

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