Experimental violation of the Leggett-Garg inequality with a single-spin system
Quantum Physics
2022-05-04 v1
Abstract
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 which exceeds the L\"uders bound with a level of confidence.
Keywords
Cite
@article{arxiv.2204.07765,
title = {Experimental violation of the Leggett-Garg inequality with a single-spin system},
author = {Maimaitiyiming Tusun and Wei Cheng and Zihua Chai and Yang Wu and Ya Wang and Xing Rong and Jiangfeng Du},
journal= {arXiv preprint arXiv:2204.07765},
year = {2022}
}