We present a feasible and efficient scheme, and its proof-of-principle demonstration, of creating entangled photon pairs in an event-ready way using only simple linear optical elements and single photons. The quality of entangled photon pair produced in our experiment is confirmed by a strict violation of Bell's inequality. This scheme and the associated experimental techniques present an important step toward linear optics quantum computation.
@article{arxiv.quant-ph/0610145,
title = {Demonstration of efficient scheme for generation of "Event Ready" entangled photon pairs from single photon source},
author = {Qiang Zhang and Xiao-Hui Bao and Chao-Yang Lu and Xiao-Qi Zhou and Tao Yang and Terry Rudolph and Jian-Wei Pan},
journal= {arXiv preprint arXiv:quant-ph/0610145},
year = {2015}
}