Quantum correlation swapping between Bell-diagonal states

IF 1.2 4区物理与天体物理 Q4 OPTICS

Laser Physics Pub Date : 2024-08-20 DOI:10.1088/1555-6611/ad6d4e

Chuanmei Xie, Senbo Tian, Zekai Xie, Jinhua Yu, Zhanjun Zhang

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引用次数: 0

Abstract

Quantum correlation (QC) swapping is a generalization of quantum entanglement swapping, in which the concerned QCs can be quantum entanglement, QC beyond quantum entanglement, or both of them. In general, QC swapping is different from quantum entanglement swapping. Obviously, the study range of the former is beyond than the latter, and the former can give more interesting and significant applications in quantum information processings. So far, QC swapping has been studied explicitly only for a rather limited set of two-qubit quantum states as the initial states and cases for more general QC swapping with multi-parameter initial states are not known. In this article, we explore the QC swapping case with three-parameter Bell-diagonal (BD) states as the initial states. The familiar QC measure, quantum discord (Ollivier and Zurek 2001 Phys. Rev. Lett. 88 017901), is utilized to quantify all the QCs in the concerned states. It is found that a long-distance shared QC can be acquired through the BD-initial states case of QC swapping. Moreover, some distinct features and characteristics can be exposed.

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贝尔对角态之间的量子相关交换

量子相关（QC）交换是量子纠缠交换的一种概括，其中相关的 QC 可以是量子纠缠，也可以是量子纠缠之外的 QC，或者两者都是。一般来说，QC 交换不同于量子纠缠交换。显然，前者的研究范围要大于后者，而且前者在量子信息处理中的应用更有趣、更有意义。迄今为止，人们只对相当有限的以二量子比特量子态为初始态的 QC 交换进行了明确的研究，而对具有多参数初始态的更一般的 QC 交换情况还不了解。在本文中，我们探讨了以三参数贝尔对角线（BD）态为初始态的 QC 交换情况。量子不和谐（Ollivier 和 Zurek 2001 Phys.研究发现，通过 QC 交换的 BD 初始态情况，可以获得远距离共享 QC。此外，还可以发现一些明显的特征和特性。

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

Laser Physics 物理-光学

CiteScore

2.60

自引率

8.30%

发文量

127

审稿时长

2.2 months

期刊介绍： Laser Physics offers a comprehensive view of theoretical and experimental laser research and applications. Articles cover every aspect of modern laser physics and quantum electronics, emphasizing physical effects in various media (solid, gaseous, liquid) leading to the generation of laser radiation; peculiarities of propagation of laser radiation; problems involving impact of laser radiation on various substances and the emerging physical effects, including coherent ones; the applied use of lasers and laser spectroscopy; the processing and storage of information; and more. The full list of subject areas covered is as follows: -physics of lasers- fibre optics and fibre lasers- quantum optics and quantum information science- ultrafast optics and strong-field physics- nonlinear optics- physics of cold trapped atoms- laser methods in chemistry, biology, medicine and ecology- laser spectroscopy- novel laser materials and lasers- optics of nanomaterials- interaction of laser radiation with matter- laser interaction with solids- photonics