We propose a novel scheme to generate polarization entanglement from spatially-correlated photon pairs. We experimentally realized a scheme by means of a spatial correlation effect in a spontaneous parametric down-conversion and a modified Michelson interferometer. The scheme we propose in this paper can be interpreted as a conversion process from spatial correlation to polarization entanglement.
@article{arxiv.0711.4177,
title = {Generation of polarization entanglement from spatially-correlated photons in spontaneous parametric down-conversion},
author = {Ryosuke Shimizu and Takashi Yamaguchi and Yasuyoshi Mitsumori and Hideo Kosaka and Keiichi Edamatsu},
journal= {arXiv preprint arXiv:0711.4177},
year = {2009}
}