$\mathcal{P}\mathcal{T}$-symmetric coupler with ${\chi }^{(2)}$ nonlinearity

K. Li, D. A. Zezyulin, P. G. Kevrekidis +2

We introduce the notion of a $\mathcal{P}\mathcal{T}$-symmetric dimer with a ${\chi }^{(2)}$ nonlinearity. Similarly to the Kerr case, we argue that such a nonlinearity should be accessible in a pair…