Two-dimensional solitons in PT linear lattice potentials.
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.
State Key Laboratory of Low Dimensional Quantum Physics, Department of Physics, Tsinghua University, Beijing 100084, China. zengjianhua1981@gmail.com
Jianhua
J
Zeng
Yueheng
Y
Lan