We present a feasible scheme to produce a polarization-entangled photon states 21(∣H>∣V>+∣V>∣H>) in a controllable way. This scheme requires single-photon sources, linear optical elements and photon detectors. It generates the entanglement of spatially separated photons. The interaction takes place in the photon detectors. We also show that the same idea can be used to produce the entangled N-photon state 21(∣0,N>+∣N,0>)
@article{arxiv.quant-ph/0110168,
title = {The feasible generation of entangled photon states by using linear optical elements},
author = {XuBo Zou and K. Pahlke and W. Mathis},
journal= {arXiv preprint arXiv:quant-ph/0110168},
year = {2009}
}