Open AccessExperimental demonstration of hidden nonlocality with local filters
Author(s) -
Yan Wang,
Jian Li,
Xiao-Run Wang,
Tongjun Liu,
Qin Wang
Publication year - 2020
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.387568
Subject(s) - quantum nonlocality , hidden variable theory , spontaneous parametric down conversion , physics , local hidden variable theory , quantum mechanics , kochen–specker theorem , chsh inequality , bell test experiments , theoretical physics , quantum , bell's theorem , parametric statistics , statistical physics , quantum entanglement , mathematics , statistics
The violation of the Bell inequalities implies that quantum mechanics cannot be interpreted using any local hidden variable theory. However, particular quantum states that can originally be described using a local hidden variable model surprisingly exhibit nonlocality by employing local filters before a standard Bell test is performed. This is referred to as hidden nonlocality. In this study, we provide the experimental demonstration of hidden nonlocality through linear optics towards the local states which are put forword by Hirsch et al., PRL 111, 160402 (2013). A class of local states is generated through a spontaneous parametric down-conversion process, and the violation of the Clauser-Horne-Shimony-Holt (CHSH)-Bell inequality is observed by applying local filters. Our experimental results confirm the superiority of local filters, and throw light on deep understanding the intriguing phenomena of hidden nonlocality and local states.