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Indistinguishability of orthogonal time-separated bell states

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Chinese Physics B 2008年第9期17卷 3194-3197页

作者：谭勇刚蔡庆宇史庭云 State Key Laboratory of Magnetic Resonances and Atomic and Molecular Physics Wuhan Institute of Physics and MathematicsChinese Academy of Sciences Graduate University of the Chinese Academy of Sciences

This paper proves that it is impossible to identify orthogonally time-separated bell states. If two qubits of a bell state interact with the measurement apparatus at different time, any attempt to identify this state ... 详细信息

关键词： bell states time-separated indistinguishability

Quantum Secure Direct Communication Protocol with Mutual Authentication Based on Single Photons and bell states

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Computers, Materials & Continua 2020年第6期63卷 1297-1307页

作者： Lili Yan Shibin Zhang Yan Chang Zhibin Sun Zhiwei Sheng School of Cybersecurity Chengdu University of Information TechnologyChengdu610000China Natural Resource Ecology Laboratory Colorado State UniversityFort CollinsCO 80523USA

Quantum secure direct communication(QSDC)can transmit secret messages directly from one user to another without first establishing a shared secret key,which is different from quantum key *** this paper,we propose a novel quantum secure direct communication protocol based on signal photons and bell *** the execution of the proposed protocol,two participants Alice and Bob exchange their corresponding identity IDA and IDB through quantum key distribution and keep them secret,*** the message sender,Alice,encodes each secret message bit into two single photons(|01>or|10>)or a bell state(1|φ^(+)>=1/√2(|0>|-|1>1>)),and composes an ordered secret message *** insure the security of communication,Alice also prepares the decoy photons and inserts them into secret message sequence on the basis of the values of IDA and *** the secret identity IDA and IDB,both sides of the communication can check eavesdropping and identify each *** proposed protocol not only completes secure direct communication,but also realizes the mutual *** security analysis of the proposed protocol is presented in the *** analysis results show that this protocol is secure against some common attacks,and no secret message leaks even if the messages are *** with the two-way QSDC protocols,the presented protocol is a one-way quantum communication protocol which has the immunity to Trojan horse ***,our proposed protocol can be realized without quantum memory.

关键词： Quantum secure direct communication mutual authentication bell states single photons

Perfect Quantum Teleportation via bell states

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Computers, Materials & Continua 2018年第12期57卷 495-503页

作者： Xiaoqing Tan Xiaochun Li Pei Yang Department of Mathematics School of Information Science and TechnologyJinan UniversityGuangzhou510632China

Quantum mechanics shows superiority than classical mechanics in many aspects and quantum entanglement plays an essential role in information processing and some computational tasks such as quantum teleportation(QT).QT was proposed to transmit the unknown states,in which EPR pairs,the entangled states,can be used as quantum *** this paper,we present two simple schemes for teleporting a product state of two arbitrary single-particle and an arbitrary two-particle pure entangled state *** and Bob have shared an entangle *** bell states are used as quantum *** after Alice measuring her qubits and informing Bob her measurement results,Bob can perfectly reconstruct the original state by performing corresponding unitary operators on his *** shown that a product state of two arbitrary single-particle and an arbitrary two-particle pure entangled state can be teleported perfectly,*** success probabilities of our schemes are both 1.

关键词： Quantum teleportation bell states product state pure entangled state

New controlled quantum key agreement protocols based on bell states

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The Journal of China Universities of Posts and Telecommunications 2022年第4期29卷 42-50页

作者： He Yefeng Yue Yuru Li Guoqing Liu Jixiang Di Man Pang Yibo School of Cyberspace Security Xi’an University of Posts and TelecommunicationsXi’an 710121China

The controlled quantum key agreement(CQKA)protocol requires a controller to oversee the process of all participants negotiating a key,which can satisfy the needs of certain specific *** CQKA protocols are mostly two-party or three-party,and they do not entirely meet the actual *** address this problem,this paper proposes new CQKA protocols based on bell states and bell *** new CQKA protocols can be successfully implemented for any N-party,not just ***,the security and efficiency analyses demonstrate that the new CQKA protocols are not only secure but also more efficient in terms of quantum bit.

关键词： quantum cryptography quantum key agreement controlled quantum key agreement bell states controller

Generation and dynamic manipulation of frequency degenerate polarization entangled bell states by a silicon quantum photonic circuit

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Chip 2022年第1期1卷 1-7页

作者： Dong-Ning Liu Jing-Yuan Zheng Ling-Jie Yu Xue Feng Fang Liu Kai-Yu Cui Yi-Dong Huang Wei Zhang Frontier Science Center for Quantum Information Beijing Innovation Center for Future ChipsBeijing National Research Center for Information Science and Technology(BNRist)Electronic Engineering DepartmentTsinghua UniversityBeijing 100084China Beijing Academy of Quantum Information Sciences Beijing 100193China

A silicon quantum photonic circuit was proposed and realized for the generation and the dynamic manipulation of telecom-band frequency-degenerate polarization entangled bell *** degenerate biphoton states were generated in four silicon waveguides by spontaneous four wave *** were transformed to polar-ization entangled bell states through on-chip quantum interference and quantum superposition,and then coupled to optical *** property of polarization entanglement in generated photon pairs was demonstrated by two-photon interference under two non-orthogonal polarization *** output state could be dynamically switched between two bell states,which was demonstrated by the simplified bell state *** experiment results indicated that the manipulation speed supported a modulation rate of several tens kHz,showing its potential on applications of quantum communication and quantum information processing requiring bell state encoding and dynamic control.

关键词： Quantum information processing Silicon quantum photonic circuits Spontaneous four wave mixing Quantum interference bell states

Emission Spectrum from Two Atoms in bell states in a Cavity

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Chinese Journal of Lasers 2002年第6期11卷 14-18页

作者：曹卓良周正威郭光灿韩正甫 Anhui University China China Department of Physics Hefei 230039 Key Laboratory of Quantum Information and Department of Physics The University of Science and Technology of China The University of Science and Technology of China Hefei 230026

By means of time evolution operator, the emission spectrum from two two level entangled atoms in bell states interacting with a single mode cavity field in the Fock state has been studied in the paper. The physical spectrum expression of radiation emitted by the atoms is given out for each bell state. In general, the spectrum shows the symmetrical multi peak structure and the symmetrical three peak structure with the strong optical input. bell states composed of two identical atoms can be partially distinguished in view of the characterizations of their emission spectrum

关键词： entangled atoms bell states emission spectrum

Anti-Noise Quantum Network Coding Protocol Based on bell states and Butterfly Network Model

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Journal of Quantum Computing 2019年第2期1卷 89-109页

作者： Zhexi Zhang Zhiguo Qu Jiangsu Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Nanjing University of Information Science and TechnologyNanjing210044China School of Computer and Software Nanjing University of Information Science and TechnologyNanjing210044China

How to establish a secure and efficient quantum network coding algorithm isone of important research topics of quantum secure communications. Based on thebutterfly network model and the characteristics of easy preparation of bell states, a novelanti-noise quantum network coding protocol is proposed in this paper. The new protocolencodes and transmits classical information by virtue of bell states. It can guarantee thetransparency of the intermediate nodes during information, so that the eavesdropper Evedisables to get any information even if he intercepts the transmitted quantum states. Inview of the inevitability of quantum noise in quantum channel used, this paper analyzesthe influence of four kinds of noises on the new protocol in detail further, and verifies theefficiency of the protocol under different noise by mathematical calculation and *** addition, based on the detailed mathematical analysis, the protocol has functioned wellnot only on improving the efficiency of information transmission, throughput and linkutilization in the quantum network, but also on enhancing reliability and antieavesdroppingattacks.

关键词： Network coding quantum network coding bell states butterfly networkmodel quantum communication eavesdropping detection

Authenticated Quantum Dialogue Without Information Leakage

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Chinese Journal of Electronics 2018年第2期27卷 270-275页

作者： WANG He ZHANG Yuqing WU Gaofei MA Hua The State Key Laboratory of Integrated Services Networks Xidian University National Computer Network Intrusion Protection Center University of Chinese Academy of Sciences School of Mathematics and Statistics Xidian University

A lot of authenticated quantum dialogue protocols are springing up. Many of them have the problem of information leakage, or suffer from Man-In-TheMiddle attack. Some protocols can guarantee security, but have relatively low efficiency. Based on the above situation, we present a novel authenticated quantum dialogue protocol by using bell states and entanglement *** this protocol, we adopt Einstein-Podolsky-Rosen(EPR)pairs to detect eavesdropping and transmit secret messages. We employ polarized photons to achieve authentication of users’ identity information. Compared with other quantum dialogue schemes with authentication, our protocol has several advantages. The transmitted particles are passed once and do not carry any secret messages. The proposed protocol can overcome the drawback of information leakage and resist against typical attacks. The efficiency is acceptable.

关键词： Quantum dialogue bell states Authentication Entanglement swapping

An arbitrated quantum signature scheme based on entanglement swapping with signer anonymity

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Chinese Physics B 2012年第12期21卷 78-83页

作者：李伟范明钰王光卫 School of Information Science and Engineering Xinjiang University School of Computer Science and Engineering University of Electronic Science and Technology of China

In this paper an arbitrated quantum signature scheme based on entanglement swapping is proposed. In this scheme a message to be signed is coded with unitary operators. Combining quantum measurement with quantum encryption, the signer can generate the signature for a given message. Combining the entangled states generated by the TTP＇s bell measurement with the signature information, the verifier can verify the authentication of a signature through a single quantum state measurement. Compared with previous schemes, our scheme is more efficient and less complex, furthermore, our scheme can ensure the anonymity of the signer.

关键词： quantum cryptography quantum signature bell states entanglement swapping