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。
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 α1, α2,α3 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 UM 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 UM and so on can be directly extended to any possibility teleportation of a general entangled state by means of general entangled channels.
出处
《原子与分子物理学报》
CAS
CSCD
北大核心
2005年第4期694-700,共7页
Journal of Atomic and Molecular Physics
关键词
隐形传态
纠缠
W态
量子信道
Teleportation, Entanglement, W state, Quantum channel
