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arXiv quant-ph/9904015quant-ph
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吸收介质中激发态原子的自发衰变

Spontaneous decay of an excited atom in an absorbing dielectric

S. Scheel, L. Knoll, D. G. Welsch

摘要:

从任意线性Kramers-Kronig介质中电磁场的量子化Maxwell方程组出发,研究了色散吸收介质中二能级原子激发态的自发衰变,并计算了衰变率.计算是针对(Clausius-Mosotti)虚腔模型和(Glauber-Lewenstein)实腔模型进行的。结果表明,由于与吸收相关的非辐射衰变,当原子跃迁频率接近介质的吸收带时,自发衰变的速率敏感地依赖于腔半径。只有当吸收的影响被完全忽略,然后熟悉的局域场校正因子恢复。

英文摘要:

Starting from the quantized version of Maxwell's equations for the electromagnetic field in an arbitrary linear Kramers-Kronig dielectric, spontaneous decay of the excited state of a two-level atom embedded in a dispersive and absorbing medium is studied and the decay rate is calculated. The calculations are performed for both the (Clausius-Mosotti) virtual cavity model and the (Glauber-Lewenstein) real cavity model. It is shown that owing to nonradiative decay associated with absorption the rate of spontaneous decay sensitively depends on the cavity radius when the atomic transition frequency approaches an absorption band of the medium. Only when the effect of absorption is fully disregarded, then the familiar local-field correction factors are recovered.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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