四粒子纠缠的一般W态的退纠缠和W态的概率隐形传态

刘敏; 黄永畅; 李黎; 索萌

原子与分子物理学报, 2005, 22 (4): 694, 网络出版: 2006-06-13

四粒子纠缠的一般W态的退纠缠和W态的概率隐形传态

Disentanglement of four-particle entanglement general W state and probabilistic teleportation of the general W state

论文大纲

刘敏黄永畅 ^*李黎索萌

作者单位

北京工业大学应用数理学院理论物理研究室,北京,100022

隐形传态纠缠 W态量子信道 Teleportation Entanglement W state Quantum channel

摘要

我们推广地得到了到四粒子纠缠的一般W态,给出了一般W态的不同退纠缠的条件,得到了一个新的二粒子的一般W态,并得到对于四粒子纠缠的一般W态而言,其系数α1,α2和α3从一个直到全部为零时,这一般的|ΨW〉依次有一个粒子,二个粒子和最后全部粒子退出纠缠.还给出了一个利用四个二粒子纠缠态作为量子信道来传送四粒子纠缠W态的方案,并且进一步给出了当量子信道为非最大纠缠态时,四粒子纠缠的一般W态的隐形传态的一个方案,同时通过构造一个5×5 对角投影变换矩阵,解决了使用一般纠缠量子信道并不再引入辅助态时,态畸变的恢复问题.并且这里的对角投影变换UM也与以往文献中的不同,而且比过去文献的讨论更直接.因本文的研究是一般性的,本文关于对角的投影变换矩阵UM的变换方法等可以直接推广到任意一般纠缠信道的一般纠缠态的概率隐形传态.

Abstract

We have gained a general W state of four entangled particles,give different disentanglement conditions of the general W state,and gain a new general W state of two particles.For the general W state of four entangled particles,from one of the state's coefficients α_1,α_2,α_3 to all of them equal to zero,respectively,the general W state has the disentanglements from one to all the particles.And we give a scheme that uses four entangled states of two particles as quantum channels of sending an entangled W state of four particles,ulteriorly,when the quantum channels are the non-maximal entangled states,we give a teleportation scheme of the general W state of the four particles' entanglement.Through constructing a 5×5 diagonal projection transformation matrix,we solve the problem of the recovery of state distortion when using general entanglement channels and not introducing an accessorial state,the diagonal projection transformation matrix U_M is different from the one in the literatures ago,and it is discussed more directly in the article.Because the research of the article is universal, the transformation method about diagonal projection transformation matrix U_M and so on can be directly extended to any possibility teleportation of general entangled state by means of general entangled channels.

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刘敏, 黄永畅, 李黎, 索萌. 四粒子纠缠的一般W态的退纠缠和W态的概率隐形传态[J]. 原子与分子物理学报, 2005, 22(4): 694. 刘敏, 黄永畅, 李黎, 索萌. Disentanglement of four-particle entanglement general W state and probabilistic teleportation of the general W state[J]. Journal of Atomic and Molecular Physics, 2005, 22(4): 694.

四粒子纠缠的一般W态的退纠缠和W态的概率隐形传态

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