关于投影测量的量子块相干性

IF 1.5 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY

Chinese Physics B Pub Date : 2024-07-31 DOI:10.1088/1674-1056/ad50c1

Pu Wang, 璞王, Zhong-Yan Li, 忠艳李, Hui-Xian Meng and 会贤孟

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引用次数: 0

摘要

量子相干性是量子力学的一个决定性特征，在量子计算和量子通信处理中有着广泛的应用。本研究探讨了投影测量背景下的量子块相干性，重点是量化这种相干性。首先，我们定义了两个一般投影测量 P 和 Q 之间的相关函数，并分析了与两个兼容投影测量 P 和 Q 相关的块非相干态集之间的联系。基于给定的量子块相干性度量，我们通过投影测量表征了最大块相干态的存在。这项研究将投影测量与量子块相干框架的兼容性结合起来，有助于推动块相干测量理论的发展。

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Quantum block coherence with respect to projective measurements

Quantum coherence serves as a defining characteristic of quantum mechanics, finding extensive applications in quantum computing and quantum communication processing. This study explores quantum block coherence in the context of projective measurements, focusing on the quantification of such coherence. Firstly, we define the correlation function between the two general projective measurements P and Q, and analyze the connection between sets of block incoherent states related to two compatible projective measurements P and Q. Secondly, we discuss the measure of quantum block coherence with respect to projective measurements. Based on a given measure of quantum block coherence, we characterize the existence of maximal block coherent states through projective measurements. This research integrates the compatibility of projective measurements with the framework of quantum block coherence, contributing to the advancement of block coherence measurement theory.

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来源期刊

Chinese Physics B 物理-物理：综合

CiteScore

2.80

自引率

23.50%

发文量

15667

审稿时长

2.4 months

期刊介绍： Chinese Physics B is an international journal covering the latest developments and achievements in all branches of physics worldwide (with the exception of nuclear physics and physics of elementary particles and fields, which is covered by Chinese Physics C). It publishes original research papers and rapid communications reflecting creative and innovative achievements across the field of physics, as well as review articles covering important accomplishments in the frontiers of physics. Subject coverage includes: Condensed matter physics and the physics of materials Atomic, molecular and optical physics Statistical, nonlinear and soft matter physics Plasma physics Interdisciplinary physics.