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理论物理通讯：英文版

Controlled Quantum Teleportation of a One-Particle Unknown State via a Three-Particle Entangled State

Xiu Xiu, Xiaoming, Dong, LI ., Gao Gao, Yajun, Чи, Feng

Published Jan 1, 2007• 0 citations
OpenAlex

Abstract

一种三粒子的纠缠的状态作为未知的一个一个粒子的控制的量远距传物的量隧道被使用状态。未知的一个粒子状态在监督人的控制下面从发送者被传给接受者。在发送者做钟状态测量，监督人执行 von Neumann 测量以后，接受者在他从 thes ender 和监督人取决于古典信息的自己的粒子上执行单一的转变。如果监督人不同意合作，远距传物不能被接受者成功地完成。接受者和监督人的角色可以在这个计划被交换。因为发送者和监督人的操作的顺序可以被交换，仅仅简单的单一的转变被包括，计划灵活、可行。

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一种三粒子的纠缠的状态作为未知的一个一个粒子的控制的量远距传物的量隧道被使用状态。未知的一个粒子状态在监督人的控制下面从发送者被传给接受者。在发送者做钟状态测量，监督人执行 von Neumann 测量以后，接受者在他从 thes ender 和监督人取决于古典信息的自己的粒子上执行单一的转变。如果监督人不同意合作，远距传物不能被接受者成功地完成。接受者和监督人的角色可以在这个计划被交换。因为发送者和监督人的操作的顺序可以被交换，仅仅简单的单一的转变被包括，计划灵活、可行。
最近李等。当在量的量隧道控制了远距传物，建议了特殊部分纠缠的状态服务，当在他们的计划有一些限制时。基于那，我们在场在这份报纸的可能的改进。我们构造对完美的控制远距传物合适的一个新奇三粒子的部分纠缠的状态。一个简单的量电路被设计获得这个状态。我们评估量从三个观点的控制远距传物：远距传物忠实，成功概率和控制器是力量。详细计算和模拟分析证明构造状态是为任意的 qubits 的控制远距传物的一条合适的隧道，统一远距传物忠实和 100% 成功概率能被完成。同时，只要隧道是，纠纷度等于到或比 3/4 大，控制器的力量能被保证。
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.
We present a scheme for perfectly teleporting an arbitrary and unknown N -particle GHZ-class state from a sender to a receiver. We just need one quantum channel composed of two or three particles in the maximally entangled state. The sender performs one Bell-state measurement on two of her particles and N −1 Hadamard operations and N −1 von Neumann measurements on the rest N −1 particles. The receiver adopts one corresponding unitary transformation on his particles shared with the sender. After that, the receiver can obtain the original N -particle GHZ-class state by introducing N −1 ancillary particles and carrying out N −1 controlled-NOT operations. We also generalize the scheme to the case of controlled teleportation.
当三粒子的一般 W 状态的 N 组作为量隧道被利用时，移植任意的 N 粒子和未知状态的电视的二个计划被建议。在第一个计划，量隧道被发送者和接受者分享。在发送者他的上的钟状态大小以后(她的) 粒子，接受者在他的上执行单一的转变(她的) 粒子。然后，接受者执行计算基础大小认识到远距传物。如果，接受者能与成功的远距传物的相等的最大的概率粒子序列在也上恢复状态他(她) 执行适当单一的转变。在第二个计划，量隧道被发送者，接受者和第三分享。在如果他们同意合作，发送者的钟状态大小和第三大小是计算基础大小以后，接受者将介绍辅助粒子并且执行适当单一的转变。最后，接受者执行计算基础大小完成远距传物。如果并且仅当第三同意与接受者合作，第二个计划能被认识到。
Two schemes for teleporting an unknown one-particle state are proposed when a general W state is utilized as quantum channel. In the first scheme, after the sender (Alice) makes a Bell-state measurement on her particles, the recipient (Bob) performs a Von Neumann measurement and introduces an auxiliary particle, and carries out a unitary transformation on his particle and the auxiliary particle, and performs a Von Neumann measurement on the auxiliary particle to confirm whether the teleportation succeeds or not. In the second scheme, the recipient (Bob) does not need to perform the first Von Neumann measurement or introduce the auxiliary particle, which is necessary in the first scheme. It is shown that the maximal probabilities of successful teleportation of the two schemes are identical if the recipient (Bob) performs an appropriate unitary transformation and adopts a proper particle on which he recovers the quantum information of state to be teleported.