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Acta Physica Sinica

Quantum communication scheme based on quantum teleportation

Yang Lu, Hongyang Ma, Chao Zheng, Ding Xiao-Lan, Gao Jian-Cun, Long Gui-Lu

Published Jan 1, 2017• 18 citations

Abstract

量子保密通信包括量子密钥分发、量子安全直接通信和量子秘密共享等主要形式.在量子密钥分发和秘密共享中，传输的是随机数而不是信息，要再经过一次经典通信才能完成信息的传输.在量子信道直接传输信息的量子通信形式是量子安全直接通信.基于量子隐形传态的量子通信（简称量子隐形传态通信）是否属于量子安全直接通信尚需解释.构造了一个量子隐形传态通信方案，给出了具体的操作步骤.与一般的量子隐形传态不同，量子隐形传态通信所传输的量子态是计算基矢态，大大简化了贝尔基测量和单粒子操作.分析结果表明，量子隐形传态通信等价于包含了全用型量子密钥分发和经典通信的复合过程，不是量子安全直接通信，其传输受到中间介质和距离的影响，所以不比量子密钥分发更有优势.将该方案与量子密钥分发、量子安全直接通信和经典一次性便笺密码方案进行对比，通过几个通信参数的比较给出各个方案的特点，还特别讨论了各方案在空间量子通信方面的特点.

DOI: 10.7498/aps.66.230303

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量子保密通信包括量子密钥分发、量子安全直接通信和量子秘密共享等主要形式.在量子密钥分发和秘密共享中，传输的是随机数而不是信息，要再经过一次经典通信才能完成信息的传输.在量子信道直接传输信息的量子通信形式是量子安全直接通信.基于量子隐形传态的量子通信（简称量子隐形传态通信）是否属于量子安全直接通信尚需解释.构造了一个量子隐形传态通信方案，给出了具体的操作步骤.与一般的量子隐形传态不同，量子隐形传态通信所传输的量子态是计算基矢态，大大简化了贝尔基测量和单粒子操作.分析结果表明，量子隐形传态通信等价于包含了全用型量子密钥分发和经典通信的复合过程，不是量子安全直接通信，其传输受到中间介质和距离的影响，所以不比量子密钥分发更有优势.将该方案与量子密钥分发、量子安全直接通信和经典一次性便笺密码方案进行对比，通过几个通信参数的比较给出各个方案的特点，还特别讨论了各方案在空间量子通信方面的特点.

The authors investigate physical principium for building the quantum teleportation net by using three-particle GHZ states,find out unitary transformation matrix for quantum teleportation of three-particle GHZ states,and design a token ring-shaped quantum teleportation net.The authors propose a scheme for quantum communications net and its protocol.If all stations work as the scheme,quantum communications between any two stations may be realized.All station and manage expense can be monitored by using monitor station.

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 avowable quantum communication schemes are proposed. One is an avowable teleportation protocol based on the quantum cryptography. In this protocol one teleports a set of one-particle states based on the availability of an honest arbitrator, the keys and the Einstein–Podolsky–Rosen pairs shared by the communication parties and the arbitrator. The key point is that the fact of the teleportation can neither be disavowed by the sender nor be denied by the receiver. Another is an avowable quantum secure direct communication scheme. A one-way Hash function chosen by the communication parties helps the receiver to validate the truth of the information and to avoid disavowing for the sender.

This thesis is focused on the design and analysis of quantum communication protocols. Several schemes for quantum communication have been introduced in the recent past. For example, quantum teleportation, dense coding, quantum key distribution, quantum secure direct communication, etc., have been rigorously studied in the last 2-3 decades. Specifically, a specific attention of the present thesis is to study the quantum teleportation schemes with entangled orthogonal and nonorthogonal states and their experimental realization, but not limited to it. We have also studied some aspects of quantum cryptography.