Two-dimensional solitons in PT linear lattice potentials

Phys Rev E Stat Nonlin Soft Matter Phys. 2012 Apr;85(4 Pt 2):047601. doi: 10.1103/PhysRevE.85.047601. Epub 2012 Apr 17.

Abstract

We investigate two-dimensional (2D) ordinary and gap solitons in the 2D and the quasi-one-dimensional parity-time (PT) linear lattice potentials. The stability diagrams for both versions of PT potentials are given. Particularly, we find that 2D gap solitons with self-attractive nonlinearity may exist in the PT lattice, but they are unstable due to the collapse instability.