Asymmetrical Bell state analysis for photon-atoms hybrid system

作     者：Yi-Lin Liu Miao-Wei Wang Chun-Yu Bai Tie-Jun Wang 

作者机构：School of ScienceBeijing University of Posts and TelecommunicationsBeijing 100876China State Key Laboratory of Information Photonics and Optical CommunicationsBeijing University of Posts and TelecommunicationsBeijing 100876China 

出 版 物：《Science China(Physics,Mechanics & Astronomy)》 (中国科学：物理学、力学、天文学（英文版）)

年 卷 期：2019年第62卷第12期

页      面：10-18页

核心收录：

学科分类：07[理学] 070201[理学-理论物理] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(Grant No.61671083) the National Key Research and Development Program of China(Grant No.2016YFA0301304) the Fund of State Key Laboratory of Information Photonics and Optical Communications(Beijing University of Posts and Telecommunications),China 

主　　题：quantum optics quantum information processing quantum cryptography 

摘      要：Bell-state analysis(BSA) has great application in the quantum communication. To our best knowledge, the current works are devoted to the physical realization of symmetrical 2×2-dimensional or 2^N× 2^N-dimensional 2-qudit BSA, and there is no work focused on the physical realization of the asymmetrical high-dimensional(for example 3×4-dimensional 2-qudit) Bell-states complete analysis. In this paper, by using the nonlinear interaction between the atoms and photons, we propose a scheme to completely distinguish the asymmetrical 3×4-dimensional 2-qudit Bell states of a hybrid system. We use the quantum information splitting, which is exploited to resolve the degree-mismatch issue in the quantum state sharing schemes, as an example to show the application of the asymmetrical BSA. Finally, we discuss its possible realization with current experimental techniques. Our asymmetrical high-dimensional BSA protocol may pave a new way for high-capacity long-distance quantum communication.