论文标题
线性启示超级和次级的光学解释
Optical interpretation of linear-optics superradiance and subradiance
论文作者
论文摘要
超级和亚降低通常在迪克集体状态的框架中描述，这是``原子图片''，其中电磁场仅提供原子之间的有效相互作用。在这里，我们讨论了互补的图片，其中我们描述了原子介质中光的传播和散射，该介质提供了复杂的敏感性和散射体。此``光学图片''在无序样品的线性访问方案中有效，并且当可以从简单的教科书公式中计算出敏感性和散射横截面时，主要是在低密度上相关的。在这张图片中，由于有有效的折射率打扮的单个散射事件，超沉淀是分散效应，而次级是由于多个散射。我们提供了支持我们解释的数值和实验数据。
Super- and subradiance are usually described in the framework of Dicke collective states, which is an ``atomic picture'' in which the electromagnetic field only provides an effective interaction between the atoms. Here, we discuss a complementary picture, in which we describe the propagation and scattering of light in the atomic medium, which provides a complex susceptibility and scatterers. This ``optical picture'' is valid in the linear-optics regime for disordered samples and is mainly relevant at low density, when the susceptibility and scattering cross-section can be computed from simple textbook formulas. In this picture, superradiance is a dispersion effect due to a single scattering event dressed by an effective refractive index, whereas subradiance is due to multiple scattering. We present numerical and experimental data supporting our interpretation.
