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Multi-state Quantum Teleportation via One entanglement state

Communications in Theoretical Physics 2008年第8期50卷 363-367页

作者： GUO Ying ZENG Gui-Hua Moon Ho Lee School of Information Science ＆ Engineering Central South University Changsha 410083 China state Key Laboratory on Fiber-Optic Local Area Networks and Advanced Optical Communication Systems Department of Electronic Engineering Shanghai Jiao Tong University Shanghai 200240 China Department of Information ＆ Communication Engineering Chonbuk National University Chonju 561-756 Korea

A multi-sender-controlled quantum teleportation scheme is proposed to teleport several secret quan- tum states from different senders to a distance receiver based on only one Einstein-Podolsky-Rosen (EPR) pair with controlled-NOT (CNOT) *** the present scheme,several secret single-qubit quantum states are encoded into a multi-qubit entangled quantum *** communication modes,i.e.,the detecting mode and the message mode,are employed so that the eavesdropping can be detected easily and the teleported message may be recovered *** has an advantage over teleporting several different quantum states for one scheme run with more efficiency than the previous quantum teleportation schemes.

关键词： quantum teleporlation entanglement state

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entanglement between two atoms in the system of SchrSdinger cat state interacting with two entangled atoms

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Chinese Physics B 2007年第11期16卷 3396-3401页

作者：刘堂昆 Hubei Province Key Laboratory of Bioanalytical Technique(Hubei Normal University).Department of Physics Hubei Normal UniversityHuangshi435002China

By the negative eigenvalues of partial transposition of density matrix, this paper investigates the time evolution of entanglement of the two entangled atoms in the system of two atoms interacting with SchrSdinger cat state. The result shows that the two atoms are always in the entanglement state, and the degree of entanglement between the two atoms exhibits ordinary collapses and revivals at 0.2 degree of entanglement, when the light field is large enough. On the other hand, the reinforcement of three different light fields on the degree of entanglement between two atoms is not evident.

关键词： negative eigenvalues entanglement state Schrodinger cat state

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Measurement-device-independent quantum dialogue

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Chinese Physics B 2021年第10期30卷 132-137页

作者： Guo-Fang Shi School of Science Xi’an University of Posts and TelecommunicationsXi’an 710061China

Recently,measurement-device-independent quantum secure direct communication schemes were proposed by Niu et al.[***.631345(2018)]and Zhou et al.[***.63230362(2020)].Inspired by their ideas,in this paper,a measurement-device-independent quantum dialogue protocol based on entanglement is designed and proven to be *** advantage of this scheme is that it can not only allow two communicators to transmit secret messages between each other,making the application scenarios more extensive,but can also eliminate all the security loopholes related to the measurement device and information *** terms of experimental implementation,the scheme mainly involves the preparation of entangled states,the preparation of single photons,quantum storage,Bell measurement and other technologies,all of which are mature at present,therefore,the scheme is feasible by using current technologies.

关键词： quantum dialogue entanglement state Bell measurement

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Scheme for teleportation of unknown single qubit state via continuous variables entangling channel

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Chinese Physics B 2010年第11期19卷 109-112页

作者：王中结张侃范朝阳 Department of Physics Anhui Normal University

A new scheme for quantum teleportation of single quantum bit state with using continuous variables entangling channel is presented. In our scheme two entangled light fields are employed. An outstanding characteristic of this scheme is that one atomic state is transmitted directly to another atom without using the third atom as the mediate.

关键词： teleportation entanglement state quantum measurement

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