共查询到19条相似文献,搜索用时 78 毫秒
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利用三粒子W态隐形传送任意三粒子W态 总被引:2,自引:0,他引:2
提出一个任意三粒子W态从发送者传送给两个接收者任意一个的量子隐形传送方案.该方案用三个三粒子W态作为量子信道,且有两种方法实现传送目的.若发送者进行三次Bell态测量,想得到所需传送三粒子W态的接收者根据发送者的Bell态测量结果和另一个接收者在计算基{|0>,|1>}下的测量结果实施适当的幺正变换操作,就可以一定概率成功地隐形传送三粒子W态;分析表明如果改变操作秩序,成功实现量子隐形传态的概率不会受到影响.同时,该方案可推广至隐形传送N(N≥4)粒子W态,这时需要用N个三粒子W态作为量子信道.发送者做N次Bell态测量,接收者根据如前所述的所有测量结果实施相应的幺正变换,即可完成对N粒子W态的隐形传送. 相似文献
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四粒子纠缠的一般W态的退纠缠和W态的概率隐形传态 总被引:5,自引:2,他引:3
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。 相似文献
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提出了一个基于高维2m+1粒子纠缠态的任意m粒子态量子可控离物传态方案,发送方Alice对需传送的未知态量子系统和手中的纠缠粒子执行m个广义Bell基测量,控制方执行广义X基测量,依据预先共享量子纠缠态非定域相关性,接收方对手中的粒子执行相应的幺正操作就可以重建原来未知量子态.与其他方案相比,方案减少了任意高维多粒子态可控离物传送所需传送粒子数.我们进一步讨论了基于纯纠缠信道的概率量子可控离物传态方案,通过与发送方和控制方合作,接收方只需对手中的纠缠粒子和引入的附加粒子执行联合幺正演化和投影测量,就可以在他的粒子上概率的重建原来的未知量子态,最后,方案计算讨论了基于纯纠缠态量子可控离物传态成功概率与信道纠缠度之间的关系. 相似文献
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利用非Bell基测量实现两粒子纠缠态的隐形传输 总被引:2,自引:1,他引:1
研究无Bell基测量的未知两粒子纠缠态的隐形传态方案。Alice需传送未知两原子纠缠态给Bob,以她和Bob的原子组成的最大纠缠GHZ态作为量子信道,通过两原子同时在一个强经典驱动场驱动下和一个单模腔场发生相互作用,产生态的演化,从而实现隐形传态。本方案可忽略腔场热作用和腔延迟作用的影响,传送成功的总几率为1。 相似文献
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二粒子纠缠态(EPR对)的量子隐形传送 总被引:2,自引:1,他引:1
采用三粒子最大纠缠态作辅助量子信道,定义出能被Alice作联合测量的四个特殊的"GHZ"态,Bob实施简单操作,两粒子纠缠态(EPR对)的量子隐形传递顺利达成. 相似文献
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DAI Hong-Yi ZHANG Ming LI Cheng-Zu 《理论物理通讯》2008,49(4):891-894
We present a scheme for probabilistically teleporting an unknown three-level bipartite entangled state by using a partial entangled three-level bipartite state as quantum channel This scheme can be directly generalized to probabilistically teleport an unknown three-level k-particle entangled state by a partial three-level bipartite entangled state. A11 kinds of unitary transformations are given in detail We calculate the successful total probability and the total classical communication cost required for this scheme. 相似文献
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Controlled Quantum Teleportation of a One-Particle Unknown State via a Three-Particle Entangled State 总被引:1,自引:0,他引:1
XIU Xiao-Ming DONG Li GAO Ya-Jun CHI Feng 《理论物理通讯》2007,48(2):261-263
A kind of three-particle entangled state is applied as quantum channel of the controlled quantum teleporration of a one-particle unknown state. The one-particle unknown state is transmitted from the sender to the recipient under the control of the supervisor. After the sender makes Bell-state measurement and the supervisor performs von Neumann measurement, the recipient carries out unitary transformation on his own particle depending on classical information from the sender and the supervisor. The teleportation cannot be completed successfully by the recipient if the supervisor does not agree to cooperate. The roles of the recipient and the supervisor may be exchanged in this scheme. The scheme is flexible and feasible because the sequence of manipulation of the sender and the supervisor may be exchanged and only simple unitary transformation is included. 相似文献
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A kind of three-particle entangled state is applied as quantum channel of the controlled quantum teleportation of a one-particle unknown state. The one-particle unknown state is transmitted from the sender to the recipient under the control of the supervisor. After the sender makes Bell-state measurement and the supervisor performs von Neumann measurement, the recipient carries out unitary transformation on his own particle depending on classical information from the sender and the supervisor. The teleportation cannot be completed successfully by the recipient if the supervisor does not agree to cooperate. The roles of the recipient and the supervisor may be exchanged in this scheme. The scheme is flexible and feasible because the sequence of manipulation of the sender and the supervisor may be exchanged and only simple unitary transformation is included. 相似文献
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Teleportation of Two-Particle Entangled State via Cluster State 总被引:5,自引:0,他引:5
In this paper,two schemes for teleporting an unknown two-particle entangled state from the sender (Alice)to the receiver (Bob) via a four-particle entangled cluster state are proposed.In these two schemes,the unknown twoparticle entangled state can be teleported perfectly.The successful probabilities and fidelities of the schemes can reach unity. 相似文献