Remote restoring of (0,1)-excitation states and concurrence scaling

IF 0.7 4区 物理与天体物理 Q3 COMPUTER SCIENCE, THEORY & METHODS International Journal of Quantum Information Pub Date : 2024-04-20 DOI:10.1142/s0219749924500205
N. A. Tashkeev, A. I. Zenchuk
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引用次数: 0

Abstract

We study the long distance (0,1)-excitation state restoring in the linear open chain governed by the XX-Hamiltonian. We show that restoring the 1-order coherence matrix results in restoring the 1-excitation block of the 0-order coherence matrix, so that only one 0-excitation element of the density matrix remains unrestored. Such restoring also scales the concurrence between any two qubits of the transferred state, the scaling factor is defined by the Hamiltonian and doesn’t depend on the initial sender’s state. Sender–Receiver entanglement is also studied via the PPT criterion.

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(0,1)-激发态的远程恢复和并发缩放
我们研究了由 XX-Hamiltonian 控制的线性开放链中的长距离(0,1)激发态复原。我们证明,还原 1 阶相干矩阵会导致还原 0 阶相干矩阵中的 1 阶激发块,因此密度矩阵中只有一个 0 阶激发元素没有被还原。这种还原也会缩放转移态任意两个量子比特之间的一致性,缩放因子由哈密顿定义,与发送者的初始状态无关。发送方与接收方的纠缠也是通过 PPT 准则来研究的。
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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