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Quantum secret sharing between multiparty and multiparty with four states

science china(Physics,Mechanics & Astronomy) 2007年第5期50卷 572-580页

作者： yan fengli1, {2. ting2.& li youcheng1 1 college of Physics and information Engineering, Hebei normal university, shijiazhuang 050016, china 2.college of mathematics and information science, Hebei normal university, shijiazhuang 050016, china 1. college of Physics and information Engineering Hebei Normal University Shijiazhuang 050016 China 2. college of mathematics and {2. science Hebei Normal University Shijiazhuang 050016 China

A protocol of quantum secret sharing between multiparty and multiparty with four states was presented. It was shown that this protocol can nullify the Trojan horse attack with a multi-photon signal, the fake-signal attack with Einstein-Podolsky- Rosen pairs, the attack with single photons, and the attack with invisible photons. In addition, the upper bounds of the average success probabilities were given for dishonest agent eavesdropping encryption using the fake-signal attack with any two-particle entangled states.

关键词： quantum secret sharing, security, Einstein-Podolsky-Rosen pairs

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Quantum secret sharing between m-party and n-party with six states

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science china(Physics,Mechanics & Astronomy) 2009年第8期52卷 1191-1202页

作者： gao ting1,yan fengli2.3 & li youcheng2.3 1 college of mathematics and information science,Hebei {2. university,shijiazhuang 050016,china 2.college of Physics and information Engineering,Hebei {2. university,shijiazhuang 050016,china 3 Hebei Advanced Thin Films Laboratory,shijiazhuang 050016,china college of mathematics and {2. science Hebei Normal University Shijiazhuang 050016 China college of Physics and information Engineering Hebei Normal University Shijiazhuang 050016 China Hebei Advanced Thin Films Laboratory Shijiazhuang 050016 China

A quantum secret sharing scheme between an m-party group and an n-party group is proposed using three conjugate bases.A sequence of single photons,each of which is prepared in one of the six states,is used directly to encode classical information in the quantum secret sharing *** this scheme,each of all m members in group 1 chooses randomly his/her own secret key individually and independently,and directly encodes his/her respective secret information on the states of single photons via unitary operations,then the last one sends 1/n of the resul{2. qubits to each member of group *** measuring their respective qubits,all members in group 2.share the secret information shared by all members in group *** renders impossible a Trojan horse attack with a multi-photon signal,a fake-signal attack with EPR pairs,an attack with single photons,and an attack with invisible *** give the upper bounds on the average success probabilities for dishonest agent eavesdropping encryption using the fake-signal attack with any two-particle entangled states.

关键词： quantum secret sharing security EPR pairs

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Optimal controlled teleportation via several kinds of three-qubit states

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science china(Physics,Mechanics & Astronomy) 2008年第10期51卷 1529-1556页

作者： gao ting1,2. yan {2. & li youcheng3 1 college of mathematics and information science, Hebei normal university, shijiazhuang 050016, {12. 2.Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, D-85748 Garching, Germany 3 college of Physics and information Engineering, Hebei normal university, shijiazhuang 050016, {12. college of mathematics and {2. science Hebei Normal University Shijiazhuang 050016 China Max-Planck-Institut für Quantenoptik Hans-Kopfermann-Str. 1 D-85748 Garching Germany college of Physics and information Engineering Hebei Normal University Shijiazhuang 050016 China

The probability of successful controlled teleportation of an unknown qubit using a general three-particle state is investigated. The analytic expressions of maximal probabilities via several kinds of tripartite states... 详细信息

关键词： controlled teleportation three-qubit state maximal probability

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