Experimental violation of the Leggett-Garg inequality with a single-spin system
| Autor: | Maimaitiyiming Tusun, Wei Cheng, Zihua Chai, Yang Wu, Ya Wang, Xing Rong, Jiangfeng Du |
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| Rok vydání: | 2022 |
| Předmět: | |
| Zdroj: | Physical Review A. 105 |
| ISSN: | 2469-9934 2469-9926 |
| Popis: | Investigation the boundary between quantum mechanical description and classical realistic view is of fundamental importance. The Leggett-Garg inequality provides a criterion to distinguish between quantum systems and classical systems, and can be used to prove the macroscopic superposition state. A larger upper bound of the LG function can be obtained in a multi-level system. Here, we present an experimental violation of the Leggett-Garg inequality in a three-level system using nitrogen-vacancy center in diamond by ideal negative result measurement. The experimental maximum value of Leggett-Garg function is $K_{3}^{exp}=1.625\pm0.022$ which exceeds the L\"uders bound with a $5\sigma$ level of confidence. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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