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Enhanced Multiparty Controlled QSDC Using GHZ State 被引量:1
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作者 高士闳 蔡家纬 黄宗立 《Communications in Theoretical Physics》 SCIE CAS CSCD 2011年第6期1007-1011,共5页
Recently, Gao et al. [Opt. Commun. 283 (2010) 192] pointed out that Wang et al,'s multiparty controlled quantum secure direct communication (CQSDC) protocol [Opt. Commun. 266 (2006) 732] has the information lea... Recently, Gao et al. [Opt. Commun. 283 (2010) 192] pointed out that Wang et al,'s multiparty controlled quantum secure direct communication (CQSDC) protocol [Opt. Commun. 266 (2006) 732] has the information leakage problem and proposed an improved protocol. However, in the improved protocol, due to the introduction of an additional random sampling to avoid the weakness, the qubit efficiency is decreased. By introducing the base changing technique to the random sampling in Wang et al. 's protocol, this study overcomes the information leakage problem and provides a better qubit efficiency. 展开更多
关键词 quantum secure direct communication random sampling
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认证向量组长度动态更新算法
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作者 白媛 王倩 +2 位作者 贾其兰 郝瑞敏 张会兵 《北京邮电大学学报》 EI CAS CSCD 北大核心 2015年第3期66-70,共5页
针对现有演进分组系统认证与密钥协商机制中认证向量组长度K值选取算法的不足,在消息通信量的基础上,加入比特通信量这一衡量因子,引入2种浪费率作为评价指标和设计折中选取原则,提出了一种基于认证次数动态选取认证向量组长度K的算法.... 针对现有演进分组系统认证与密钥协商机制中认证向量组长度K值选取算法的不足,在消息通信量的基础上,加入比特通信量这一衡量因子,引入2种浪费率作为评价指标和设计折中选取原则,提出了一种基于认证次数动态选取认证向量组长度K的算法.仿真结果表明,提出的选取算法不仅解决了K值不唯一问题,还有效降低了认证过程的消息通信量和比特通信量. 展开更多
关键词 认证与密钥协商 消息通信量 比特通信量 认证向量组
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High-capacity quantum secure direct communication with two-photon six-qubit hyperentangled states 被引量:2
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作者 FangZhou Wu GuoJian Yang +4 位作者 HaiBo Wang Jun Xiong Faris Alzahrani Aatef Hobiny FuGuo Deng 《Science China(Physics,Mechanics & Astronomy)》 SCIE EI CAS CSCD 2017年第12期19-25,共7页
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 phot... 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 bits.Our 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 communication.The QSDC protocol has good applications in the future quantum communication because of all these features. 展开更多
关键词 quantum secure direct communication high capacity hyperentanglement two-photon six-qubit systems decoy photons
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Efcient Multipartite Polarization Entanglement Distribution Over Arbitrary Noise Channel 被引量:1
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作者 陈晓 李艳 +1 位作者 曾志 李熙涵 《Communications in Theoretical Physics》 SCIE CAS CSCD 2013年第10期421-426,共6页
We present an efficient faithful multipartite polarization entanglement distribution protocol over an ar- bitrary noisy channel. The spatial degree of freedom is used to carry the entanglement during the transmission.... We present an efficient faithful multipartite polarization entanglement distribution protocol over an ar- bitrary noisy channel. The spatial degree of freedom is used to carry the entanglement during the transmission. We describe the principle by distributing n-qubit Greenberge-Horne--Zeilinger state and n-qubit W state. Our scheme can be used to distribute arbitrary n-qUbit entangled states to n distant locations. The remote parties can obtain maximally entangled states deterministically on the polarization of photons. Only passive linear optics are employed in our setup, which makes our scheme more feasible and efficient for practical application in long distance quantum communication. 展开更多
关键词 entanglement distribution arbitrary entangled state polarization state spatial degree of freedom
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Splitting Unknown Qutrit or Ququart States via Two-Qubit Partially Entangled States Channel
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作者 章文 熊狂炜 +1 位作者 左学勤 张子云 《Communications in Theoretical Physics》 SCIE CAS CSCD 2013年第2期157-164,共8页
In this paper we propose two quantum information splitting (QIS) schemes respectively for splitting an unknown single-qutrit and single-ququart state via three pairs of two-qubit partially entangled state. The necessa... In this paper we propose two quantum information splitting (QIS) schemes respectively for splitting an unknown single-qutrit and single-ququart state via three pairs of two-qubit partially entangled state. The necessary measurements and operations are given detailedly and the success probabilities are worked out. The two schemes can be directly generalized to QIS of multi-qutrit and multi-ququart states by using Bell-states channel. 展开更多
关键词 quantum information splitting ququart QUBIT
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