“Quasi-breather solution in 2D nonlinear Schrödinger equation with nonlocal derivatives dominates at low nonlinearity levels before breaking down into Rayleigh-Jeans spectra”

https://pubmed.ncbi.nlm.nih.gov/38115495

This study identifies a new type of quasi-breather solution in a nonlinear Schrödinger equation with nonlocal derivatives in a 2D periodic domain, which dominates at low nonlinearity levels before breaking down into Rayleigh-Jeans spectra with increased nonlinearity, and discusses its behavior in the context of Kolmogorov-Arnold-Moser theory.