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Chaotic and stochastic dynamics in coupled map lattices

Grant number: 05/04136-8
Support type:Scholarships in Brazil - Post-Doctorate
Effective date (Start): February 01, 2006
Effective date (End): July 31, 2006
Field of knowledge:Physical Sciences and Mathematics - Physics - General Physics
Principal researcher:Iberê Luiz Caldas
Grantee:Sandro Ely de Souza Pinto
Home Institution: Instituto de Física (IF). Universidade de São Paulo (USP). São Paulo , SP, Brazil


In this work we will study the dynamics of two coupled map lattices, namely: a lattice where the interactions between two maps take place following a power law of the distance between them; and a lattice with near- and nearest-neighbors and randomly distributed links. The dynamics of each elemental map will be governed by the logistic map, the baker map, and the tent map with scape. All studies will be done through the analyses of the Lyapunov spectrum, Lyapunov dimension, synchronization distance, synchronization time, and recurrence time. We will analyze the control parameter space for each coupled map lattice, with different individual dynamics and determine the synchronization, intermittency, chaotic, and chaos suppression regimes. The conditions for the transitions between those regimes and the associated phenomena will be studied. The spatio-temporal behavior will be studied through the observation of structures such as zigzags, kinks and antikinks. Through the study of the mean duration time of the laminar state of the intermittent regime and the recurrence time of that regime, we will analyze the statistical properties of this regime and compare them with the observed statistics at the emergence of turbulence in fluids and plasmas. (AU)

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