Discrete solitons and vortices on two-dimensional lattices of $\mathcal{P}\mathcal{T}$-symmetric couplers

Zhaopin Chen, Jingfeng Liu, Shenhe Fu +2

We introduce a 2D network built of $\mathcal{P}\mathcal{T}$-symmetric dimers with on-site cubic nonlinearity, the gain and loss elements of the dimers being linked by parallel square-shaped…