Discrete solitons in saturable nonlinearity media with parity-time symmetric lattices

We study the existence of discrete solitons in saturable nonlinearity media with parity-time symmetric lattices. We find that there exist two kinds of discrete solitons, they share the same parameters but different energy flows. The degree of saturable nonlinearity can influence the properties of such discrete solitons. Stable discrete solitons are found near the anti-continuum limit. (C) 2014 Published by Elsevier B.V.