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controlled teleportation of an Arbitrary Two-Particle State by One EPR Pair and Cluster State

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Communications in Theoretical Physics 2011年第11期56卷 819-823页

作者：郭战营尚晓星方建兴肖瑞华 School of Physical Science and Technology Suzhou University Department of Physics Jiaozuo Normal College

A scheme for controlled teleportation of an arbitrary two-particle state using a maximally entangled EPR pair and a cluster state as the quantum channel is proposed. After receiving Alice＇s Bell state measurement results, the controller performs a joint measurement on his particles under a non-maximally entangled Bell-basis. The receiver needs to introduce an auxiliary qubit, and performs a series of appropriate unitary transformations on his particles. The original state can be teleported successfully with the probability 2 cos2θ.

关键词： controlled teleportation arbitrary two-particle state cluster state unitary transformation

controlled teleportation of Multi-qutrit Quantum Information by Swapping Entanglement

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Communications in Theoretical Physics 2008年第2期49卷 338-342页

作者： YANG Jie LIU Jun Key Laboratory of Optoelectronic Information Acquisition ＆ Manipulation of Ministry of Education of China Key Laboratory of Information Material ＆ Device of Anhui Province School of Physics ＆ Material Science Anhui University Hefei 230039 China

We present a scheme for teleporting multi-qutrit quantum information from a sender to a receiver via the control of many agents in a network. Agents＇s control parameters are obtained via quantum entanglement swapping. In our scheme, Zhang and Man＇s QSS protocol [Phys. Rev. A 72 （2005） 022303] based on Bell-state entanglement swapping is generalized to a qutrit case. Our scheme owns the advantage of having higher code capacity and better security than the work [Commun. Theor. Phys. 44 （2005） 847] on controlled teleportation for multi-qubit.

关键词： controlled teleportation multi-qutrit quantum information entanglement swapping

controlled teleportation of high-dimension quantumstates with generalized Bell-state measurement

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Chinese Physics B 2007年第9期16卷 2557-2562页

作者：詹佑邦 Department of Physics Huaiyin Teachers College Huaian 223001 China

In this paper a scheme for controlled teleportation of arbitrary high-dimensional unknown quantum states is proposed by using the generalized Bell-basis measurement and the generalized Hadamard transformation. As two special cases, two schemes of controlled teleportation of an unknown single-qutrit state and an unknown two-qutrit state are investigated in detail. In the first scheme, a maximally entangled three-qutrit state is used as the quantum channel, while in the second scheme, an entangled two-qutrit state and an entangled three-qutrit state are employed as the quantum channels. In these schemes, an unknown qutrit state can be teleported to either one of two receivers, but only one of them can reconstruct the qutrit state with the help of the other. Based on the case of qutrits, a scheme of controlled teleportation of an unknown qudit state is presented.

关键词： controlled teleportation high-dimensional quantum state generalized Bell-basis measurement generalized Hadamard transformation

controlled teleportation of multi-qudit quantum information

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Chinese Physics B 2007年第10期16卷 2880-2884页

作者：詹孝贵李红梅季花曾浩生 Department of Physics Hunan Normal University Changsha 410081 China

We propose a scheme for realizing a controlled teleportation of random M-qudit quantum information under the control of N agents. The resource consumption includes a prearranged （2M ＋ N ＋ 1）-qudit entangled quantum channel and （2M ＋ N ＋1） log2 d-bit classical communication. And the quantum operations used in the teleportation process are a series of generalized Bell-state measurements, single-qudit measurements, qudit H-gates, qudit-Pauli gates and qudit phase gates. It is shown that the original state can be restored by the receiver only on condition that all the agents work in collaboration with each others. If one agent does not cooperate with the other, the original state cannot be fully recovered.

关键词： qudit controlled teleportation agent

Effects of Phase Damping on controlled teleportation of a Qubit by a GHZ State

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Communications in Theoretical Physics 2008年第4期49卷 895-900页

作者： HAN Xiao-Ping LIU Jin-Ming State Key Laboratory of Precision Spectroscopy Department of Physics East China Normal University Shanghai 200062China

We investigate controlled teleportation ofa qubit via a GHZ state with the influence of phase damping in the Bloch sphere representation. We use the average trace distance to describe how close the output state is to the input state to be teleported. Our results show that the average trace distance is a function of decoherence rates and angles of the analyzer performed by the controller in the single-particle projective measurement. Moreover, for a fixed value of the decoherence rate, one can adjust the analyzer angle to achieve the optimal average trace distance.

关键词： controlled teleportation GHZ state phase damping trace distance

Probabilistic multiparty-controlled teleportation of an arbitrary m-qubit state with a pure entangled quantum channel against collective noise

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Science China(Physics,Mechanics & Astronomy) 2012年第12期55卷 2445-2451页

作者： LI Zhao LONG LiuRong ZHOU Ping YIN CaiLiu College of Physics and Electronic Engineering Guangxi University for NationalitiesNanning 530006China

We present two general schemes for multiparty-controlled teleportation of an arbitrary m-qubit state against two types of collective noise by using m pure entangled states as the quantum *** first is used to control teleporting for an arbitrary m-qubit state against a collective-dephasing noise with nonmaximally entangled quantum channel,and the second is in teleporting the m-qubit state against the collective-rotation *** receiver can reconstruct the original state with an auxiliary qubit and the corresponding unitary operations if he cooperates with all the *** scheme is optimal as the probability that the receiver reconstructs the original state equals to the entanglement of the quantum channel.

关键词： controlled teleportation pure entanglement collective-dephasing noise collective-rotating noise

Threshold Multiparty controlled teleportation of Arbitrary m-Qubit Quantum Information

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Communications in Theoretical Physics 2009年第10期52卷 593-596页

作者： YANG Yu-Guang WEN Qiao-Yan College of Computer Science and Technology Beijing University of Technology Beijing 100124 China State Key Laboratory of Integrated Services Network Xidian University Xi＇an 710071 China State Key Laboratory of Information Security （Graduate University of Chinese Academy of Sciences） Beijing 100049 China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing 100876 China

We present a （t, .n） threshold multiparty controlled quantum teleportation protocol of an arbitrary m-qubit quantum state between two remote parties. The unknown m-qubit quantum state can be recovered by the receiver under control of a subset of the n controllers if the number of the subset is larger than or equal to a threshold, say, t, but not for any t - 1 or fewer controllers. Our scheme seems to be more practical and more flexible than other existing protocols. The quantum resource required is just m Einstein-Podolsky-Rosen （EPR） pairs plus some single photons. The techniques required are only Bell state measurement, single-qubit unitary operation and yon Neumann measurement. So our scheme is also feasible with present-day technique.

关键词： controlled teleportation threshold controlled teleportation entanglement

Scheme for Deterministic BSM-Free controlled teleportation of Unknown Atomic States

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Communications in Theoretical Physics 2007年第12期48卷 1021-1024页

作者： WANG Ya-Hong~(1,2)SONG He-Shan~1 and LI Chong~1~1 Department of Physics,Dalian University of Technology,Dalian 116024,China~2 School of Information Science and Engineering,Institute of Light Industry,Dalian 116034,China Department of Physics Dalian University of Technology School of Information Science and Engineering Institute of Light Industry

We propose a controlled scheme for teleportation of an arbitrary one or two atomic state via a driven *** scheme does not involve the joint Bell-state-measurement BSM and the probability of successful teleportationis *** show that the original atomic state cannot be perfectly restored by the receiver without all the agents collaborateand classical communication.

关键词： controlled teleportation QED cavity GHZ state Von Neumann measurement

Probabilistically controlled teleportation of an Arbitrary Two-Qubit State via Positive Operator-Valued Measure

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Communications in Theoretical Physics 2013年第5期59卷 554-558页

作者：许海峰韩莲芳 School of Mechanical and Electronical Engineering Suzhou College School of Physics and Material Science Anhui University Department of Applied Physics School of Life ScienceAnhui Medical University

We propose a tripartite scheme for probabilistically teleporting an arbitrary two-qubit state with a fourqubit cluster-class state and a Bell-class state as the quantum channels. In the scheme, the sender and the controller make Bell-state measurements (BSMs) on their respective qubit pairs. With their measurement results, the receiver can reconstruct the original state probabilistically by introducing two auxiliary particles and making appropriate unitary operations and positive operator-valued measure (POVM) instead of usual projective measurement. Moreover, the total success probability and classical communication cost of the present protocol are also worked out.

关键词： controlled teleportation pure entangled quantum channels positive operator-valued measure success probability classical communication cost