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Probabilistic teleportation of a two-particle entangled state via a partially entangled pair

The Journal of China Universities of Posts and Telecommunications 2006年第4期13卷 39-42页

作者： CHEN Xiu-bo LIU Xin-yuan WEN Qiao-yan ZHU Fu-chen School of Science Beijing University of Posts and Telecommunications Beijing 100876 China state Key Laboratory of Integrated Services Network Xidian University Xi'an 710071 China National Laboratory for Modern Communications Chengdu 610041 China

A scheme for teleporting an unknown two-particle entangled state is proposed. In comparison with the recent protocol （Cola et al., Phys. Lett. A 337 （2005））, the entangled state as quantum channel required by this scheme is a single, partially entangled pair, which is much easier to prepare and maintain. Furthermore, a positive operator valued measure （POVM） is adopted and all kinds of transformations performed by sender and receiver are given in detail. It is shown that the probability of successful teleportation is twice the modulus square of the smaller Schmidt coefficient of the two-particle entangled state, and the fidelity can reach one.

关键词： quantum teleportation partially entangled pair two-particle entangled state POVM

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Teleportation of an unknown two-particle entangled state via an asymmetric three-particle entanglement state

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The Journal of China Universities of Posts and Telecommunications 2008年第1期15卷 102-105页

作者： CHEN Xiu-bo DU Jian-zhong WEN Qiao-yan ZHU Fu-chen state key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China School of Science Beijing University of Posts and Telecommunications Beijing 100876 China

In this article, a protocol for the teleportation of an unknown two-panicle entanglement is proposed. The feature of the present protocol is that we utilize an asymmetric threeparticle entangled state as the quantum channel. The optimal discrimination between two nonorthogonal quantum states is adopted. It is shown that an unknown two-particle entangled state can be probabilistically teleported from the sender to the remote receiver on condition that the co-sender successfully collaborates. The fidelity in this protocol is one. In addition, the probability of the successful teleportation is calculated and all kinds of transformations performed by the sender and the receiver are provided in detail.

关键词： teleportation two-particle entangled state asym metric three-particle entangled state generalized measurement

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Remote preparation of a Greenberger-Horne-Zeilinger state via a two-particle entangled state

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Chinese Physics B 2007年第5期16卷 1209-1214页

作者：林秀李洪才林秀敏李兴华杨榕灿 School of Physics and Optoelectronics Fujian Normal University Fuzhou 350007 China

We present two schemes for realizing the remote preparation of a Greenberger-Horne-Zeilinger （GHZ） state. The first scheme is to remotely prepare a general N-particle GHZ state with two steps. One is to prepare a qubit state by using finite classical bits from sender to receiver via a two-particle entangled state, and the other is that the receiver introduces N - 1 additional particles and performs N - 1 controlled-not （C-Not） operations. The second scheme is to remotely prepare an N-atom GHZ state via a two-atom entangled state in cavity quantum electrodynamics （QED）. The two schemes require only a two-particle entangled state used as a quantum channel, so we reduce the requirement for entanglement.

关键词： remote state preparation two-particle entangled state Greenberger-Horne-Zeilinger (GHZ) state controlled-not operation cavity quantum electrodynamics (QED)

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Secret sharing of quantum information via entanglement swapping

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Chinese Physics B 2006年第10期15卷 2252-2255页

作者：张英俏金星日张寿 Center for Condensed-Matter Science and Technology Harbin Institute of Technology Harbin 150001 China Department of Physics College of Science Yanbian University Yanji 133002 China

Based on entanglement swapping, a scheme for the secret sharing of an arbitrary two-particle entangled state is proposed. If the controllers do not co-operate with the eavesdropper, the eavesdropper＇s successful probability decreases with the number of the controllers increasing. In addition, only the Bell-state measurements are required to realize the secret sharing scheme.

关键词： secret sharing two-particle entangled state Dell-state measurements entanglement swapping

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Controlled Teleportation of two-Partic le Entanglement via a Cluster state

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China Communications 2012年第9期9卷 123-126页

作者： Li Jian Ye Xinxin Li Ling School of Computer Beijing University of Posts and Telecommunication Beijing 100876 P R. China PetroChina Jilin Petrochemical Company Jilin 132001 P. R. China

In order to teleport an unknown two-par-ticle entangled state via a cluster state, a controlled teleportation schelre is proposed. It is shown that an unknown two-particle entangled state can be successfully transmitted from the sender Alice to the receiver Bob with the help of the supervisor Charlie via the only one four-particle cluster state. The receiver can reconstruct the teleported state according to the lmasurement results of the sender and supervisor. Quantum Controlled-NOT （CNOT） gate and POVM are used, which have been accom-plished in a quantum experiment, so it is believed that this scheme will be realized by experirnent. By analysis, the success probability of the proposed scheme reaches 1.0.

关键词： controlled teleportation two-particle entangled state cluster state CNOT

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