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Fault-Tolerant Controlled Quantum Dialogue Using Logical Qubit

Chinese Journal of Electronics 2018年第2期27卷 263-269页

作者： XIAO Min LIU Guang School of Cyber Security and Information Law Chongqing University of Posts and Telecommunications College of Computer Science and Technology Chongqing University of Posts and Telecommunications

The information leakage is a challenge in the design of Controlled quantum dialogue(CQD) protocols and the CQD protocol over noise channel has not been well researched. A CQD protocol without information leakage over an ideal channel is first proposed, where single photons are used to carrying secret information and pre-shared keys are used to authenticate identity and control information decoding for the prevention of information leakage, moreover, a novel kind of the unitary encoding operations with good property on the quantum operation discrimination are adopted to avoid active attacks from outside eavesdropper. By substituting logical qubits for single photons and constructing unitary encoding operations with the same property based on logical qubits,three fault-tolerant versions of the proposed CQD protocol are obtained, which can combat collective-dephasing,collective-rotation and all kinds of unitary collective noise,respectively. The security and efficiency analysis show the proposed protocols are appropriate for secure quantum dialogue in practice.

关键词： Controlled quantum dialogue(CQD) Single photon Logical qubit noise channel

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Controlled Quantum Teleportation Through Noisy GHZ channel

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Communications in Theoretical Physics 2010年第3期53卷 489-495页

作者：苗纯杨名曹卓良 Key Laboratory of Opto-Electronic Information Acquisition and Manipulation (Ministry of Education) School of Physics & Material ScienceAnhui University Department of Physics and Electronic Engineering Hefei Normal University

In this paper, we propose two physical schemes for teleporting an unknown atomic state through noisy channel in cavity QED. The quantum channel is a noisy one -- a mixed GHZ state, which is more realistic in quantum information processing. We solve analytically a master equation in the Lindblad form with （L2,z, L3,z, L4,z）-type of noise in cavity Q, ED. A comparison between the two protocols are discussed.

关键词： teleportation cavity QED noise channel GHZ state

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Analysis and Improvement of Steganography Protocol Based on Bell States in noise Environment

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Computers, Materials & Continua 2019年第5期59卷 607-624页

作者： Zhiguo Qu Shengyao Wu Wenjie Liu Xiaojun Wang Jiangsu Engineering Center of Network Monitoring Nanjing University of Information Science and TechnologyNanjing210044China School of Computer&Software Nanjing University of Information Science and TechnologyNanjing210044China School of Electronic Engineering Dublin City UniversityDublinIreland

In the field of quantum communication,quantum steganography is an important branch of quantum information *** a realistic quantum communication system,quantum noises are unavoidable and will seriously impact the safety and reliability of the quantum steganographic ***,it is very important to analyze the influence of noise on the quantum steganography protocol and how to reduce the effect of *** paper takes the quantum steganography protocol proposed in 2010 as an example to analyze the effects of noises on information qubits and secret message qubits in the four primary quantum noise *** results show that when the noise factor of one quantum channel noise is known,the size of the noise factor of the other quantum channel can be adjusted accordingly,such as artificially applying noise,so that the influence of noises on the protocol is *** addition,this paper also proposes a method of improving the efficiency of the steganographic protocol in a noisy environment.

关键词： Quantum steganography quantum noise noise channel fidelity efficiency

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