Single-photon superradiance in cold atoms
Single-photon superradiance in cold atoms
复制标题
DOI：
10.1103/physreva.90.023848
复制
发表时间：
2014-08-26
影响因子：
2.9
通讯作者：
Felinto, Daniel
中科院分区：
文献类型：
--
作者：
de Oliveira, Rafael A.;Mendes, Milrian S.;Felinto, Daniel
原子系综与共同真空模式的相互作用可能导致这些模式的增强发射。这种现象，被称为超辐射，突出了自发辐射的相干性，导致在平凡的情况下宏观纠缠态。然而，超辐射的典型观测的复杂性掩盖了它的量子性质，允许替代的经典解释。在这里，我们强调如何改变这一情况与实施10年前的一个新的过程中产生的单光子从原子系综。然后，我们提出的最后一块证据的超辐射性质的这样一个过程，报告观察到的加速发射的光子的速率，可以通过可控地改变原子的数量在合奏。我们希望这样的调查将有助于开辟一个新的自下而上的方法来研究超辐射。
The interaction of an ensemble of atoms with common vacuum modes may lead to an enhanced emission into these modes. This phenomenon, known as superradiance, highlights the coherent nature of spontaneous emission, resulting in macroscopic entangled states in mundane situations. The complexity of the typical observations of superradiance, however, masks its quantum nature, allowing alternative classical interpretations. Here we stress how this picture changed with the implementation ten years ago of a new process for single-photon generation from atomic ensembles. We present then the last piece of evidence for the superradiant nature of such a process, reporting the observation of an accelerated emission of the photon with a rate that may be tuned by controllably changing the number of atoms in the ensemble. We hope such an investigation will help open up a new bottom-up approach to the study of superradiance.