Experimental Characterization of Quantumness Using the Uncertainty Principle, Coherence, and Nonlocality

Heisenberg's uncertainty principle, coherence, and Bell nonlocality have been individually examined through many experiments. In this Letter, we systematically characterize all of this quantumness in a unified manner. We first construct universal uncertainty relations to reveal intrinsic features of incompatible measurements, which include all the state-independent uncertainties as special cases. We further extend to witness both quantum coherence and Bell nonlocality. We finally perform experiments with unified two-photon states and validate the uncertainty principle, coherence, and Bell nonlocality within experimental error. Our methods for witnessing quantumness are valuable in characterizing quantum correlations in quantum information processing.

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Publication Details

Journal
Physical Review Letters
Published
2025-06-18
DOI
https://doi.org/10.1103/p5pd-749f
Primary Topic
Quantum Mechanics and Applications
Type
article
Field-Weighted Citation Impact
0.00

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article

Experimental Characterization of Quantumness Using the Uncertainty Principle, Coherence, and Nonlocality

Xue Yang, Yan‐Han Yang, Zizhu Wang, Shao-Ming Fei et al.
Physical Review Letters
Quantum Mechanics and Applications
article

Experimental Characterization of Quantumness Using the Uncertainty Principle, Coherence, and Nonlocality

Xue Yang, Yan‐Han Yang, Zizhu Wang, Shao-Ming Fei, Zhihao Ma, Junli Jiang, Xing-Zhou Zheng, Ming Ronnier Luo, Xin-Zhu Liu
article en

Abstract

Heisenberg's uncertainty principle, coherence, and Bell nonlocality have been individually examined through many experiments. In this Letter, we systematically characterize all of this quantumness in a unified manner. We first construct universal uncertainty relations to reveal intrinsic features of incompatible measurements, which include all the state-independent uncertainties as special cases. We further extend to witness both quantum coherence and Bell nonlocality. We finally perform experiments with unified two-photon states and validate the uncertainty principle, coherence, and Bell nonlocality within experimental error. Our methods for witnessing quantumness are valuable in characterizing quantum correlations in quantum information processing.

Physical Review LettersVol. 135(2)
University of Electronic Science and Technology of China (CN), Shanghai Jiao Tong University (CN), Hefei University (CN), Max Planck Institute for Mathematics in the Sciences (DE), Ministry of Education (IR), Max Planck Institute for Mathematics (DE), Institute of Mathematical Statistics (US), Southwest Jiaotong University (CN), Capital Normal University (CN)
National Natural Science Foundation of China, Southwest Jiaotong University, Natural Science Foundation of Sichuan Province, National Key Research and Development Program of China, Fundamental Research Funds for the Central Universities
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Quantum Mechanics and Applications
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Experimental Characterization of Quantumness Using the Uncertainty Principle, Coherence, and Nonlocality — Xue Yang, Yan‐Han Yang, et al. · Physical Review Letters (2025) | TGRS Research Map | TGRS