$\mathcal{PT}$-symmetric ladders with a scattering core
Pattern Formation and Solitons
2015-06-22 v2
Abstract
We consider a -symmetric chain (ladder-shaped) system governed by the discrete nonlinear Schr\"odinger equation where the cubic nonlinearity is carried solely by two central "rungs" of the ladder. Two branches of scattering solutions for incident plane waves are found. We systematically construct these solutions, analyze their stability, and discuss non-reciprocity of the transmission associated with them. To relate these results to finite-size wavepacket dynamics, we also perform direct simulations of the evolution of the wavepackets, which confirm that the transmission is indeed asymmetric in this nonlinear system with the mutually balanced gain and loss.
Cite
@article{arxiv.1407.1086,
title = {$\mathcal{PT}$-symmetric ladders with a scattering core},
author = {Jennie D'Ambroise and Stefano Lepri and Boris A. Malomed and Panayotis G. Kevrekidis},
journal= {arXiv preprint arXiv:1407.1086},
year = {2015}
}