超辐射中的亚泊松光子统计

SUB-POISSON PHOTON STATISTICS IN A SUPERRADIANCE

本文利用推广的Jaynes-Cummings模型描述N个二能级原子的超辐射,得到了辐射场的二阶关联函数的一般表达式。并进而用于缓变耦合情况,着重研究了共振情况下由超泊松光场演化成亚泊松光场的初始条件。作为例子,讨论了推广相干态及压缩相干态的演化条件。最后提出了利用相干态光场观察亚泊松光子统计的实验建议。

A superradiance from N two-level atoms is described by making use of the generalized Jaynes- Cummings model. The general expression for the second- order correlation function of the radiation field is obtained, and using it to the case with slowly- varying coupling and puting emphasis on studying, on resonance, the initial conditions for change from super- Poisson field to sub- Poisson field. The conditions are discussed, as examples, for both generalized coherent states and squeezed coherent states. A suggestion for experimental observation of sub- Poisson statistics from coherent state field is present.