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arXiv 2310.02501quant-phcond-mat.othermath-phmath.MP
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多体系统中量子关联传播的定量界

Quantitative bounds to propagation of quantum correlations in many-body systems

Davide Girolami, Michele Minervini

AI总结:

本研究通过建立量子失谐的连续性界和纠缠形成的普遍上界,证实了多体系统中经典信息的增殖会抑制量子关联的传播。

摘要:

我们通过建立多体系统中二分量子关联的定量限制,研究了关于一个量子系统的信息能够同时传达给独立观测者的程度。正如最近在《物理评论快报》129, 010401 (2022) 中所报道的,单个量子系统与其环境(例如大量光子)之间的量子失谐和纠缠形成界表明,监测环境碎片的独立观测者不可避免地只能获得关于该系统的经典信息。在此,我们证实并推广了这些发现。首先,我们计算了量子失谐的连续性界,这些界确定了具有少量量子关联的状态偏离经典概率分布嵌入的程度。此外,我们证明了多体量子系统中任意一对分量之间的二分纠缠形成的普遍有效上界。这些结果证实了宇宙中经典信息的增殖抑制了量子关联。

英文摘要:

We investigate how much information about a quantum system can be simultaneously communicated to independent observers, by establishing quantitative limits to bipartite quantum correlations in many-body systems. As recently reported in Phys. Rev. Lett. 129, 010401 (2022), bounds on quantum discord and entanglement of formation between a single quantum system and its environment, e.g., a large number of photons, dictate that independent observers which monitor environment fragments inevitably acquire only classical information about the system. Here, we corroborate and generalize those findings. First, we calculate continuity bounds of quantum discord, which establish how much states with a small amount of quantum correlations deviate from being embeddings of classical probability distributions. Also, we demonstrate a universally valid upper bound to the bipartite entanglement of formation between an arbitrary pair of components of a many-body quantum system. The results confirm that proliferation of classical information in the Universe suppresses quantum correlations.

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