Manifestation of strange nonchaotic attractors in extended systems: a study through out-of-time-ordered correlators

被引：2

作者：

Muruganandam, P. ^{[1
]}

Senthilvelan, M. ^{[2
]}

机构：

[1] Bharathidasan Univ, Dept Phys, Tiruchirappalli 620024, Tamil Nadu, India

[2] Bharathidasan Univ, Dept Nonlinear Dynam, Tiruchirappalli 620024, Tamil Nadu, India

来源：

EUROPEAN PHYSICAL JOURNAL B | 2022年 / 95卷 / 08期

关键词：

INTERMITTENCY; SPECTRA;

D O I：

10.1140/epjb/s10051-022-00390-1

中图分类号：

O469 [凝聚态物理学];

学科分类号：

070205 ;

摘要：

We study the spatial spread of out-of-time-ordered correlators (OTOCs) in coupled map lattices (CMLs) of quasiperiodically forced nonlinear maps. We use instantaneous speed (IS) and finite-time Lyapunov exponents (FTLEs) to investigate the role of strange non-chaotic attractors (SNAs) on the spatial spread of the OTOC. We find that these CMLs exhibit a characteristic on and off type of spread of the OTOC for SNA. Further, we provide a broad spectrum of the various dynamical regimes in a two-parameter phase diagram using IS and FTLEs. We substantiate our results by confirming the presence of SNA using established tools and measures, namely the distribution of finite-time Lyapunov exponents, phase sensitivity, spectrum of partial Fourier sums, and 0-1 test.

引用

页数：15

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