Single photons emerging from q-plates (or Pancharatnam-Berry phase optical element) exhibit entanglement in the degrees of freedom of spin and orbital angular momentum. We put forward an experimental scheme for probing the spin-orbit correlations of single photons. It is found that the Clauser-Horne-Shimony-Holt (CHSH) parameter S for the single-photon spin-orbit entangled state could be up to 2.828, evidently violating the Bell-like inequality and thus invalidating the noncontextual hidden variable (NCHV) theories.
Cite
@article{arxiv.0911.0544,
title = {Single-photon spin-orbit entanglement violating a Bell-like inequality},
author = {Lixiang Chen and Weilong She},
journal= {arXiv preprint arXiv:0911.0544},
year = {2015}
}
Comments
12 pages, 3 figures,final version accepted for publication in JOSAB