Experimentally ruling out joint reality based on operational completeness
| Autor: | Zhang, Qiuxin, Xiang, Yu, Gao, Xiaoting, Zhu, Chenhao, Wang, Yuxin, Ding, Liangyu, Zhang, Xiang, Zhang, Shuaning, Cheng, Shuming, Hall, Michael J. W., He, Qiongyi, Zhang, Wei |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Quantum Science and Technology 9, 025001 (2024) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1088/2058-9565/ad1b4c |
| Popis: | Whether the observables of a physical system admit real values is of fundamental importance to a deep understanding of nature. In this work, we report a device-independent experiment to confirm that the joint reality of two observables on a single two-level system is incompatible with the assumption of operational completeness, which is strictly weaker than that of preparation noncontextuality. We implement two observables on a trapped $^{171}{\rm Yb}^{+}$ ion to test this incompatibility via violation of certain inequalities derived from both linear and nonlinear criteria. Moreover, by introducing a highly controllable dephasing channel, we show that the nonlinear criterion is more robust against noise. Our results push the fundamental limit to delineate the quantum-classical boundary and pave the way for exploring relevant problems in other scenarios. Comment: 6 pages, 3 figures |
| Databáze: | arXiv |
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