基于电磁感应透明的量子信息存储研究

量子信息是量子力学与信息科学交叉的前沿领域,如何对量子信息进行存储和处理是人们研究的核心问题之一.采用数值模拟方法研究基于电磁感应透明技术存储光量子信息,并考虑了信号场与原子系统的耦合系数、原予弛豫率和控制光场强弱变化等对存储过程的影响.结果表明,存储后输出的信号脉冲强度随着耦合系数的增大而增大、随着原子驰豫率的增大而减小、随着控制光强的增大而增大.此外,控制光的强弱也对信号脉冲的存储位置产生影响.

Study of the stored photonic information based on the technique of electromagnetically induced transparency

How to store and process the quantum information is one of the core issues for the present study of quantum information. With numerical simulation method, the process of stored photonic information was based on the technique of electromagnetically induced transparency (EIT). And then, the influence on the storing process by changes of the coupling coefficient between the signal light and the atom, the atoms relaxation rate, and the controlling light were discussed. It shows that the output signal impulse is stronger with great strength of the coupling coefficient and the controlling light, and weaker with great atoms relaxation rate. Furthermore, the storage position is influenced by the intensity of controlling light.