Perfect quantum controlled teleportation via a novel threeparticle partially entangled channel  

作　　者：Chen Na Quan Dongxiao Yang Hong Pei Changxing 

机构地区：[1]State Key Laboratory of Integrated Services Networks, Xidian University

出　　处：《The Journal of China Universities of Posts and Telecommunications》2015年第6期45-50,共6页中国邮电高校学报（英文版）

基　　金：supported by the National Natural Science Foundation of China (61372076, 61301171);the 111 Project (B08038);the Fundamental Research Funds for the Central Universities (K5051201021)

摘　　要：Recently Li et al. proposed special partially entangled states serving as quantum channel in quantum controlled teleportation, while there are some limitations in their scheme. Based on that, we present a possible improvement in this paper. We construct a novel three-particle partially entangled state which is suitable for perfect controlled teleportation. A simple quantum circuit is designed to obtain this state. We evaluate quantum controlled teleportation from three points of view： teleportation fidelity, success probability and the controller＇s power. Detailed calculations and simulation analyses show that the constructed state is a suitable channel for controlled teleportation of arbitrary qubits, unit teleportation fidelity and 100% success probability can be achieved. Meanwhile, as long as channel＇s entanglement degree equals to or greater than 3/4, the controller＇s power can be guaranteed.Recently Li et al. proposed special partially entangled states serving as quantum channel in quantum controlled teleportation, while there are some limitations in their scheme. Based on that, we present a possible improvement in this paper. We construct a novel three-particle partially entangled state which is suitable for perfect controlled teleportation. A simple quantum circuit is designed to obtain this state. We evaluate quantum controlled teleportation from three points of view： teleportation fidelity, success probability and the controller＇s power. Detailed calculations and simulation analyses show that the constructed state is a suitable channel for controlled teleportation of arbitrary qubits, unit teleportation fidelity and 100% success probability can be achieved. Meanwhile, as long as channel＇s entanglement degree equals to or greater than 3/4, the controller＇s power can be guaranteed.

关 键 词：quantum controlled teleportation three-particle partially entangled state quantum circuit 

分 类 号：TN918[电子电信—通信与信息系统] O413[电子电信—信息与通信工程]