A scheme of generating controllable (2+1) photons in a double- atomic system based on active-Raman-gain is presented in this paper. Such (2+1) photons can be a potential candidate to generate a correlated photon pair as the photon `1' acts as a trigger. Compared to other schemes of generating correlated photon pairs, our scheme exhibits a number of advantages due to the exploit of the stimulated Raman process.
Cite
@article{arxiv.0803.1010,
title = {Generating correlated (2+1)-photon in an active Raman gain medium},
author = {Chun-Hua Yuan and Cui-Ping Lu and Weiping Zhang and L. Deng},
journal= {arXiv preprint arXiv:0803.1010},
year = {2015}
}