Efficient quantum secure direct communication with complete Bell‐state measurement

Quantum EngineeringVolume 3, Issue 4 e83 RESEARCH ARTICLE Efficient quantum secure direct communication with complete Bell-state measurement Cheng-Yan Gao, Corresponding Author Cheng-Yan Gao gcygcy@tynu.edu.cn Department of Physics, Taiyuan Normal University, Jinzhong, China Institute of Computational and Applied Physics, Taiyuan Normal University, Jinzhong, China Correspondence Cheng-Yan Gao, Department of Physics, Taiyuan Normal University, Jinzhong 030619, China. Email: gcygcy@tynu.edu.cnSearch for more papers by this authorPeng-Liang Guo, Peng-Liang Guo Department of Physics, Taiyuan Normal University, Jinzhong, China Institute of Computational and Applied Physics, Taiyuan Normal University, Jinzhong, ChinaSearch for more papers by this authorBao-Cang Ren, Bao-Cang Ren Department of Physics, Capital Normal University, Beijing, ChinaSearch for more papers by this author Cheng-Yan Gao, Corresponding Author Cheng-Yan Gao gcygcy@tynu.edu.cn Department of Physics, Taiyuan Normal University, Jinzhong, China Institute of Computational and Applied Physics, Taiyuan Normal University, Jinzhong, China Correspondence Cheng-Yan Gao, Department of Physics, Taiyuan Normal University, Jinzhong 030619, China. Email: gcygcy@tynu.edu.cnSearch for more papers by this authorPeng-Liang Guo, Peng-Liang Guo Department of Physics, Taiyuan Normal University, Jinzhong, China Institute of Computational and Applied Physics, Taiyuan Normal University, Jinzhong, ChinaSearch for more papers by this authorBao-Cang Ren, Bao-Cang Ren Department of Physics, Capital Normal University, Beijing, ChinaSearch for more papers by this author First published: 03 November 2021 https://doi.org/10.1002/que2.83 Funding information: Bao-Cang Ren, 11604226; CIT&TCD201904080 Read the full textAboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinked InRedditWechat Abstract Quantum secure direct communication (QSDC) is a powerful technique of transmitting confidential information directly and securely based on the pre-established secure quantum channel and block transmission. Here we propose an efficient QSDC protocol using the complete Bell-state measurement (CBSM) resorting to linear optical elements and temporal-polarization hyperentanglement. In this protocol, the polarized entangled photons are utilized as the information carrier, and all the detection events of CBSM can be identified with common single-photon detectors instead of photon number resolving detectors due to the introduction of temporal degree of freedom (DOF). Moreover, since all the two-photon detection events in CBSM are effective and can be preserved with the efficiency of 100% rather than 50% in the previous QSDC, the quantum efficiency of QSDC can be doubled by encoding more messages on entangled photon pairs. Open Research DATA AVAILABILITY STATEMENT The data that support the findings of this study are available from the corresponding author upon reasonable request. Volume3, Issue4December 2021e83 RelatedInformation