IF 2.2 3区 物理与天体物理 Q1 PHYSICS, MATHEMATICAL
Seungmin Lee, Changsuk Noh, Jiyong Park
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引用次数: 0

摘要

量子不和谐是量子相关性的一个重要衡量标准,它超越了量子纠缠的范式。然而,计算量子不和谐涉及对测量进行优化,这在计算上具有挑战性,而且往往不可行。这就提出了一个耐人寻味的高斯极值问题--参考高斯态的量子不和谐能否为原始态的量子不和谐提供一个有意义的约束。在本文中,我们通过比较参考高斯态的高斯不和谐与量子不和谐来研究这个问题。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Quantum discord is not extremalized by Gaussian states

Quantum discord is an important measure of quantum correlations that goes beyond the paradigm of quantum entanglement. However, calculating quantum discord involves optimization over measurements, which is computationally challenging and often infeasible. This raises the intriguing question of Gaussian extremality—whether the quantum discord of a reference Gaussian state can provide a meaningful bound to the quantum discord of the original state. In this paper, we investigate this question by comparing the Gaussian discord of a reference Gaussian state with the quantum discord.

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来源期刊
Quantum Information Processing
Quantum Information Processing 物理-物理:数学物理
CiteScore
4.10
自引率
20.00%
发文量
337
审稿时长
4.5 months
期刊介绍: Quantum Information Processing is a high-impact, international journal publishing cutting-edge experimental and theoretical research in all areas of Quantum Information Science. Topics of interest include quantum cryptography and communications, entanglement and discord, quantum algorithms, quantum error correction and fault tolerance, quantum computer science, quantum imaging and sensing, and experimental platforms for quantum information. Quantum Information Processing supports and inspires research by providing a comprehensive peer review process, and broadcasting high quality results in a range of formats. These include original papers, letters, broadly focused perspectives, comprehensive review articles, book reviews, and special topical issues. The journal is particularly interested in papers detailing and demonstrating quantum information protocols for cryptography, communications, computation, and sensing.
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