Rb原子系综中读光跃迁频率对光与原子纠缠影响

The Influence of Readout Transition Selection in Rb Atom Ensemble on the Quality of Light and Atom Entanglement Source

在87Rb冷原子系综中,利用自发Raman散射过程实现了光与原子纠缠。通过选择两个不同的跃迁频率的读光对存储的自旋波进行读出,在两种不同读光频率下测量了读出效率以及Bell参数S值。结果发现在读光功率相同的条件下其中一种读光频率的读出效率为18%,Bell参量S值为2.68。另一种读光频率的读出效率达到38%,Bell参量S值为2.5。本文的研究成果为产生高质量的光与原子纠缠源提供了实验基础。

In the 87Rb cold atom ensemble,the entanglement of light and atoms was realized by using the spontaneous Raman Scattering process.The spin wave was read out by selecting two different transition frequencies.The readout efficiency and S value of bell parameter were measured under two different reading frequencies.The results show that the readout efficiency of one frequency is 18%,and the S value of bell parameter is 2.68.The readout efficiency of the other frequency is 38%,and the S value of bell parameter is 2.5.The results of this paper provide an experimental basis for the generation of high quality quantum entanglement of light and atomic.