By using finite resolution measurements it is possible to simultaneously obtain noisy information on two non-commuting polarization components of a single photon. This method can be applied to a pair of entangled photons with polarization statistics that violate Bell's inequalities. The theoretically predicted results show that the non-classical nature of entanglement arises from negative joint probabilities for the non-commuting polarization components. These negative probabilities allow a "disentanglement" of the statistics, providing new insights into the non-classical properties of quantum information.
@article{arxiv.quant-ph/0010022,
title = {Information and noise in photon entanglement},
author = {Holger F. Hofmann},
journal= {arXiv preprint arXiv:quant-ph/0010022},
year = {2007}
}
Comments
6 pages, contribution to the proceedings of the Quantum Information Technology conference QIT4 held November 29th to 30th 2000 near Tokyo