Single-photon quantum router based on asymmetric intercavity couplings  

作　　者：Ji-Yang Li Xin-Lei Li Guo-An Yan 

机构地区：[1]College of Physics and Engineering,Qufu Normal University,Qufu 273165,China

出　　处：《Communications in Theoretical Physics》2020年第5期52-57,共6页理论物理通讯（英文版）

基　　金：supported by the Project of Introduction and Cultivation for Young Innovative Talents in Colleges and Universities of Shandong Province。

摘　　要：As a special quantum node in a quantum network,the quantum router plays an important role in storing and transferring quantum information.In this paper,we propose a quantum router scheme based on asymmetric intercavity couplings and a three-levelΛ-type atomic system.This scheme implements the quantum routing capability very well.It can perfectly transfer quantum information from one quantum channel to another.Compared with the previous quantum routing scheme,our proposed scheme can achieve the transfer rate of single photons from one quantum channel to another quantum channel reaching 100%,the high transfer rate is located in the almost quadrant regions with negative values of the two variablesλa andλb,and their maximum values Tu^b+Td^b=1 emerge in the center pointλa=λb=-1.Therefore,it is possibly feasible to efficiently enhance the routing capability of the single photons between two channels by adjusting the inter-resonator couplings,and the asymmetric intercavity coupling provides a new method for achieving high-fidelity quantum routers.

关 键 词：quantum router asymmetric intercavity quantum information processing 

分 类 号：O413[理学—理论物理]