Bi-directional quantum teleportation of GHZ-like states

IF 0.7 4区 物理与天体物理 Q3 COMPUTER SCIENCE, THEORY & METHODS
Leila S. Tabatabaei, B. Vakili
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引用次数: 1

Abstract

In this paper we propose a method through which $n$-qubit states can simultaneously be bi-directionally transmitted between two users. We assume that Alice and Bob, the legitimate users, each have a $n$-qubit GHZ-like state and want to teleport it to the other party. Also, a four-qubit cluster state plays the role of the quantum channel of this bi-directional quantum teleportation. The protocol is based on the method that at first, each user, through a series of $\mbox{CNOT}$ gates, converts the $n$-qubit state into a single qubit and some $0$ qubits. Then, by means of the Bell state measurement and proper operation, the single qubit state is transferred over the channel between the two sides. By re-applying the $\mbox{CNOT}$ gates on the transmitted qubits and auxiliary $0$ states, each user reconstructs the initial GHZ-like state. Finally, we investige the effects of some kind of noises on the density marix of the channel due to its interaction with the environment and present a method to protect the channel against the bit-flip error.
类GHZ态的双向量子隐形传态
在本文中,我们提出了一种方法,通过该方法,$n$-量子位状态可以在两个用户之间同时双向传输。我们假设合法用户Alice和Bob都有一个类似于$n$-量子比特GHZ的状态,并希望将其传送给另一方。此外,四量子比特簇态在这种双向量子隐形传态中起着量子通道的作用。该协议基于这样一种方法,即首先,每个用户通过一系列$\mbox{CNOT}$门,将$n$-量子位状态转换为单个量子位和一些$0$量子位。然后,通过Bell态测量和适当的操作,在两侧之间的信道上传输单个量子位状态。通过在传输的量子位和辅助$0$状态上重新应用$\mbox{CNOT}$门,每个用户重建初始类GHZ状态。最后,我们研究了由于信道与环境的相互作用,某些噪声对信道密度的影响,并提出了一种保护信道免受比特翻转误差的方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
International Journal of Quantum Information
International Journal of Quantum Information 物理-计算机:理论方法
CiteScore
2.20
自引率
8.30%
发文量
36
审稿时长
10 months
期刊介绍: The International Journal of Quantum Information (IJQI) provides a forum for the interdisciplinary field of Quantum Information Science. In particular, we welcome contributions in these areas of experimental and theoretical research: Quantum Cryptography Quantum Computation Quantum Communication Fundamentals of Quantum Mechanics Authors are welcome to submit quality research and review papers as well as short correspondences in both theoretical and experimental areas. Submitted articles will be refereed prior to acceptance for publication in the Journal.
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