论文标题
分散介质中的自发发射，而无需点孔近似
Spontaneous emission in dispersive media without point-dipole approximation
论文作者
论文摘要
我们研究了一个嵌入在分散环境中的两级量子系统，并与电磁场结合。我们将光 - 物质相互作用的理论扩展到包括系统的空间扩展，并通过其波形来考虑。这是超出点 - 偶极近似之外的开发。这种成分使我们能够克服与绿色张量传播器有关的分歧问题。因此，我们可以对自发排放率和羔羊转移的表达进行重新制定。特别是，原子系统的空间结构的包含阐明了原子态在这些量中的空间反演方面的不对称作用。
We study a two-level quantum system embedded in a dispersive environment and coupled with the electromagnetic field. We expand the theory of light-matter interactions to include the spatial extension of the system, taken into account through its wavefunctions. This is a development beyond the point-dipole approximation. This ingredient enables us to overcome the divergence problem related to the Green tensor propagator. Hence, we can reformulate the expressions for the spontaneous emission rate and the Lamb shift. In particular, the inclusion of the spatial structure of the atomic system clarifies the role of the asymmetry of atomic states with respect to spatial inversion in these quantities.
