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arXiv · 2506.21051

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

Yan-Han Yang·Xin-Zhu Liu·Xing-Zhou Zheng·Jun-Li Jiang·Xue Yang·Shao-Ming Fei·Zhihao Ma·Zizhu Wang·Ming-Xing Luo
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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 the experimental error. Our methods for witnessing quantumness are valuable in characterizing quantum correlations in quantum information processing.

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Yan-Han Yang, Xin-Zhu Liu, Xing-Zhou Zheng, Jun-Li Jiang, Xue Yang, Shao-Ming Fei, Zhihao Ma, Zizhu Wang, Ming-Xing Luo. 2025-06-26. Experimental Characterization of Quantumness Using the Uncertainty Principle, Coherence, and Nonlocality. https://arxiv.org/abs/2506.21051

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