State-independent experimental test of quantum contextuality

@article{Kirchmair2009StateindependentET,
title={State-independent experimental test of quantum contextuality},
author={G. Kirchmair and F. Z{\"a}hringer and R. Gerritsma and M. Kleinmann and O. G{\"u}hne and A. Cabello and R. Blatt and C. Roos},
journal={Nature},
year={2009},
volume={460},
pages={494-497}
}

The question of whether quantum phenomena can be explained by classical models with hidden variables is the subject of a long-lasting debate. In 1964, Bell showed that certain types of classical models cannot explain the quantum mechanical predictions for specific states of distant particles, and some types of hidden variable models have been experimentally ruled out. An intuitive feature of classical models is non-contextuality: the property that any measurement has a value independent of… Expand