发表机构
Ningbo University; Suzhou City University; Nanjing University of Aeronautics and Astronautics; The Chinese University of Hong Kong（宁波大学; 苏州城市学院; 南京航空航天大学; 香港中文大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本研究通过实验验证了量子资源中局部最大相干性与全局量子互信息之间的权衡关系，确立了基本不等式，并揭示了量子网络中局部与全局资源的互斥性。
AI 中文摘要
不同量子资源之间的相互转换引起了广泛关注，例如相干性与纠缠之间的权衡。然而，局部与全局量子资源之间的关系在很大程度上仍未得到探索。在此，我们提出并实验演示了量子资源中的局部-全局权衡，分别通过局部最大相干性和量子互信息来量化。我们的实验表明，局部最大相干性与量子互信息之和受一个确定的上限约束。这些结果不仅建立了一个基本的权衡不等式，而且为局部与全局量子资源之间的互补性提供了直接的实验证据。此外，我们的发现揭示了量子网络中的一个重要约束：各个节点可用的局部量子资源与网络的全局量子资源是互斥的，这意味着增强一方必然限制另一方。
英文摘要
The interconversion among different quantum resources has attracted considerable attention, exemplified by the tradeoff between coherence and entanglement. However, the relationship between local and global quantum resources remains largely unexplored. Here, we propose and experimentally demonstrate a local global tradeoff in quantum resources, quantified respectively by the local maximum coherence and the quantum mutual information. Our experiments show that the sum of the local maximum coherence and the quantum mutual information is bounded by a definitive upper limit. These results not only establish a fundamental tradeoff inequality, but also provide direct experimental evidence of the complementarity between local and global quantum resources. Moreover, our findings reveal an important constraint in quantum networks: the local quantum resources available at individual nodes and the global quantum resources of the network are mutually exclusive, implying that enhancing one necessarily limits the other.
Comments5 pages, 4 figures
Journal refPhys. Rev. Research 8, L022041 (2026)
