当前位置: X-MOL 学术Eur. Phys. J. B › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Manifestation of strange nonchaotic attractors in extended systems: a study through out-of-time-ordered correlators
The European Physical Journal B ( IF 1.6 ) Pub Date : 2022-08-08 , DOI: 10.1140/epjb/s10051-022-00390-1
P. Muruganandam , M. Senthilvelan

Abstract

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.

Graphic Abstract



中文翻译:

扩展系统中奇怪的非混沌吸引子的表现:通过无序相关器的研究

摘要

我们研究了准周期强制非线性映射的耦合映射格 (CML) 中无序相关器 (OTOC) 的空间分布。我们使用瞬时速度 (IS) 和有限时间 Lyapunov 指数 (FTLE) 来研究奇怪的非混沌吸引子 (SNA) 在 OTOC 的空间传播中的作用。我们发现这些 CML 表现出 SNA 的 OTOC 传播的开和关类型的特征。此外,我们使用 IS 和 FTLE 在两参数相图中提供了广泛的各种动态机制。我们通过使用已建立的工具和措施确认 SNA 的存在来证实我们的结果,即有限时间 Lyapunov 指数的分布、相位灵敏度、部分傅里叶和的频谱和 0-1 检验。

图形摘要

更新日期:2022-08-09
down
wechat
bug