基于电磁诱导透明的原子自旋波读出效率实验研究

光信息的存储与读出效率对量子信息领域有着重要的意义, 电磁诱导透明是最常用的方法. 本论文基于电磁诱导透明方法首次在热原子系综中实验研究了反 向和同向读取原子自旋波信息的回复效率, 并对实验结果进行了理论分析, 实验和理论的结果都表明同向和反向读出效率的高低取决于原子系综中原子自旋波的强度空间分布. 这一实验研究将会对热原子系综中的光与原子信号相互转换过程的应用有着一定的意义. 关键词： 电磁诱导透明 反向传播 原子系综

Experimental research on retrieval efficiency of atomic spin wave based on electromagnetically induced transparency

The retrieve process of stored light field is important for quantum information, nonlinear optics, and quantum optics. Electromagnetically induced transparency (EIT) is one of the popular methods. In this paper we demonstrate the co-propagating and counter-propagating scheme of EIT retrieved in vapor ⁸⁷Rb atomic cell. Result indicates that the retrieval efficiency depends on the spatial distribution of the atomic spin waves. Our experimental results may be useful to quantum information and nonlinear optics with vapor atomic ensemble.
Keywords： electromagnetically induced transparency counter-propagating atomic ensemble