We investigate the steady-state photon-number squeezing and quantum entanglement in a network of nondegenerate optical parametric oscillators (NOPOs). We treat each NOPO with Shen's Raman laser model, whose lasing mode provides a photon-number-squeezed state. Two dissipatively coupled NOPOs satisfy Hillery-Zubairy's HZ1 entanglement criterion if they are pumped far above the threshold and the dissipative coupling is sufficiently larger than the NOPO cavity loss.
@article{arxiv.1906.12044,
title = {Steady-state squeezing and entanglement in a dissipatively coupled NOPO network},
author = {Yoshitaka Inui and Yoshihisa Yamamoto},
journal= {arXiv preprint arXiv:1906.12044},
year = {2019}
}