Enhanced violations of Leggett-Garg inequalities in an experimental three-level system
Quantum Physics
2018-02-05 v3
Abstract
Leggett-Garg inequalities are tests of macroscopic realism that can be violated by quantum mechanics. In this letter, we realise photonic Leggett-Garg tests on a three-level system and implement measurements that admit three distinct measurement outcomes, rather than the usual two. In this way we obtain violations of three- and four-time Leggett-Garg inequalities that are significantly in excess of those obtainable in standard Leggett-Garg tests. We also report violations the quantum-witness equality up to the maximum permitted for a three-outcome measurement. Our results highlight differences between spatial and temporal correlations in quantum mechanics.
Keywords
Cite
@article{arxiv.1701.02454,
title = {Enhanced violations of Leggett-Garg inequalities in an experimental three-level system},
author = {Kunkun Wang and Clive Emary and Xiang Zhan and Zhihao Bian and Jian Li and Peng Xue},
journal= {arXiv preprint arXiv:1701.02454},
year = {2018}
}
Comments
9 pages, 3 figures