Experimentally realized local-global tradeoff in quantum resources
Abstract
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.
Versions
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BibTeX
@misc{dai2026experimentally,
title = {{Experimentally realized local-global tradeoff in quantum resources}},
author = {Yue Dai and Zhiyu Wang and Xinzhi Zhao and Xinglei Yu and Chengjie Zhang},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2609.40033},
eprint = {2609.40033},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2609.40033},
}
RIS
TY - UNPB
TI - Experimentally realized local-global tradeoff in quantum resources
AU - Yue Dai
AU - Zhiyu Wang
AU - Xinzhi Zhao
AU - Xinglei Yu
AU - Chengjie Zhang
PY - 2026
DA - 2026/10/01
PB - arXiv
DO - 10.48550/arxiv.2609.40033
UR - https://arxiv.org/abs/2609.40033
AB - 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.
ER -