We study the quantum properties of light propagating through an array of coupled nonlinear waveguides and forming a discrete soliton. We demonstrate that it is possible to use certain types of quasi-solitons to form continuous variables entanglement between the certain pair of waveguides. This entanglement generation process occurs even with a very large number of photons in the laser field used, so it does not require a special material with an extremely high nonlinearity coefficient. Also absorption in the waveguide media does not influence it too much.
@article{arxiv.2011.07662,
title = {Generation of entangled states of light using discrete solitons in waveguide arrays},
author = {V. O. Martynov and V. O. Munyaev and L. A. Smirnov},
journal= {arXiv preprint arXiv:2011.07662},
year = {2020}
}