High-capacity quantum secure direct communication with two-photon six-qubit hyperentangled states

作     者：FangZhou Wu GuoJian Yang HaiBo Wang Jun Xiong Faris Alzahrani Aatef Hobiny FuGuo Deng 

作者机构：Applied Optics Beijing Area Major Laboratory Department of Physics Beijing Normal University NAAM-Research Group Department of Mathematics Faculty of Science King Abdulaziz University 

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：2017年第60卷第12期

页      面：19-25页

核心收录：

学科分类：11[军事学] 1105[军事学-军队指挥学] 07[理学] 0839[工学-网络空间安全] 08[工学] 070201[理学-理论物理] 110505[军事学-密码学] 110503[军事学-军事通信学] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 11474027, 61675028, and 11674033) the Fundamental Research Funds for the Central Universities (Grant No. 2015KJJCA01) the National High Technology Research and Development Program of China(Grant No. 2013AA122902) 

主　　题：quantum secure direct communication high capacity hyperentanglement two photon six qubit systems decoy photons 

摘      要：This study proposes the first high-capacity quantum secure direct communication(QSDC) with two-photon six-qubit hyperentangled Bell states in two longitudinal momentum and polarization degrees of freedom(DOFs) of photon pairs, which can be generated using two 0.5 mm-thick type-I β barium borate crystal slabs aligned one behind the other and an eight-hole screen. The secret message can be independently encoded on the photon pairs with 64 unitary operations in all three DOFs. This protocol has a higher capacity than previous QSDC protocols because each photon pair can carry 6 bits of information, not just 2 or 4 *** QSDC protocol decreases the influence of decoherence from environment noise by exploiting the decoy photons to check the security of the transmission of the first photon sequence. Compared with two-way QSDC protocols, our QSDC protocol is immune to an attack by an eavesdropper using Trojan horse attack strategies because it is a one-way quantum *** QSDC protocol has good applications in the future quantum communication because of all these features.