N粒子纠缠GHZ态的控制性概率传送

提出了一种把N粒子纠缠GHZ态从发送者Alice传送给远方的接收者Bob的控制性隐形传送方案.在传送过程中,N对非最大纠缠EPR态和m粒子GHZ态被选择作为量子通道.发送者Alice先对它所拥有的粒子做贝尔态测量,然后每一位控制者对它们各自所拥有的GHZ态粒子先进行Hadamard变换再做投影测量,之后将它们的最终测量结果通过经典通道告知给接收者Bob,根据接收到的经典信息,Bob通过引入一个辅助粒子并且对它所拥有的粒子做唯一的通用幺正变换,就可以重现原始态.结果显示,传送成功的总概率为2N+1-m∏N k=1|ak|2,任何一个控制者的信息缺失都将导致传送的失败.

Controlled Probabilistic Teleportation of a N-qubit Entangled GHZ State

A scheme to control teleport a N-qubit entangled GHZ state from the sender Alice to the distant receiver Bob was proposed. During the teleportation procedure,N pair non-maximally entangled EPR state and m-qubit GHZ state were used as the quantum channel. Firstly,the sender Alice made Bell-state measurements on her qubits,then each performed a Hadamard transformation and a projection measurement on their respective GHZ qubit successively, and told receiver Bob the measurement results through classical communication. According to the classical message, Bob can faithfully restore the original state by introducing an auxiliary qubit and performing only one common unitary transformation on his own qubits. The result showed that the total probability of successful teleportation was 2N + 1- m∏ N k = 1 | ak|2. Anyone's absence will absolutely lead to the failure of teleportation.