English

Localization of disordered harmonic chain with long-range correlation

Disordered Systems and Neural Networks 2018-08-01 v1

Abstract

In the previous paper [Yamada, Chaos, Solitons &\& Fractals, {\bf 109},99(2018)], we investigated localization properties of one-dimensional disordered electronic system with long-range correlation generated by modified Bernoulli (MB) map. In the present paper, we report localization properties of phonon in disordered harmonic chains generated by the MB map. Here we show that Lyapunov exponent becomes positive definite for almost all frequencies ω\omega except ω=0\omega=0, and the BB-dependence changes to exponential decrease for B>2B > 2 , where BB is a correlation parameter of the MB map. The distribution of the Lyapunov exponent of the phonon amplitude has a slow convergence, different from that of uncorrelated disordered systems obeying a normal central-limit theorem. Moreover, we calculate the phonon dynamics in the MB chains. We show that the time-dependence of spread in the phonon amplitude and energy wave packet changes from that in the disordered chain to that in the periodic one, as the correlation parameter BB increases.

Keywords

Cite

@article{arxiv.1807.07400,
  title  = {Localization of disordered harmonic chain with long-range correlation},
  author = {Hiroaki S. Yamada},
  journal= {arXiv preprint arXiv:1807.07400},
  year   = {2018}
}

Comments

10 pages, 11 figures

R2 v1 2026-06-23T03:07:22.062Z