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arXiv quant-ph/0605089quant-ph
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局域场修正对有限尺寸体中原子自发衰变率的影响

Local-field correction to the spontaneous decay rate of atoms embedded in bodies of finite size

Ho Trung Dung, Stefan Yoshi Buhmann, Dirk-Gunnar Welsch

摘要:

在实腔模型的基础上,研究了色散吸收介质体的尺寸和形状对嵌入介质体中的激发态原子局域场修正自发衰变的影响。通过玻恩展开的系统的格林张量,它表明,在线性顺序的身体的磁化率的衰减率完全遵循托马斯的公式发现的特殊情况下的原子在一个均匀的电介质球的中心[物理评论A 63,053811(2001)]。它进一步表明,对于一个原子位于一个任意的电介质体的内部,这个公式仍然有效,超出了线性秩序。详细讨论了原子嵌入弱极化球的情形。

英文摘要:

The influence of the size and shape of a dispersing and absorbing dielectric body on the local-field corrected spontaneous-decay of an excited atom embedded in the body is studied on the basis of the real-cavity model. By means of a Born expansion of the Green tensor of the system it is shown that to linear order in the susceptibility of the body the decay rate exactly follows Tomas's formula found for the special case of an atom at the center of a homogeneous dielectric sphere [Phys. Rev. A 63, 053811 (2001)]. It is further shown that for an atom situated at the interior of an arbitrary dielectric body this formula remains valid beyond the linear order. The case of an atom embedded in a weakly polarizable sphere is discussed in detail.

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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