Scaling of energy spreading in a disordered Ding-Dong lattice
Disordered Systems and Neural Networks
2020-06-24 v1
Abstract
We study numerically propagation of energy in a one dimensional Ding-Ding lattice, composed of linear oscillators with ellastic collisions. Wave propagation is suppressed by breaking translational symmetry, we consider three way to do this: a position disorder, a mass disorder, and a dimer lattice with alternating distances between the units. In all cases the spreading of an initially localized wavepacket is irregular, due to appearance of chaos, and subdiffusive. Guided by a nonlinear diffusion equation, we establish that the mean waiting times of spreading obey a scaling law in dependence on energy. Moreover, we show that the spreading exponents very weakly depend on the level of disorder.
Keywords
Cite
@article{arxiv.1911.12058,
title = {Scaling of energy spreading in a disordered Ding-Dong lattice},
author = {A. Pikovsky},
journal= {arXiv preprint arXiv:1911.12058},
year = {2020}
}