Summary
2007 International Symposium on Nonlinear Theory and its Applications
2007
Session Number:17PM1-D
Session:
Number:17PM1-D-3
Control of Spatiotemporal Intermittency by Parametric Resonance
Noriko Oikawa, Yoshiki Hidaka, Shoichi Kai,
pp.47-50
Publication Date:2007/9/16
Online ISSN:2188-5079
DOI:10.34385/proc.41.17PM1-D-3
Summary:
We investigate the control of spatially extended chaotic state in an electroconvective systems of a nematic liquid crystal. The spatiotemporal intermittency (STI) is a coexistent state of laminar (defect lattice : DL) and turbulent domains. The controlling STI that turbulent state changes to DL can achieved via slowly varying amplitude modulation (AM) of the applied ac voltage. This suppression of intermittent characters is caused by a resonance between the oscillation of lattices and the slow AM. We calculated correlation functions for the binarized time series measured at a local point which represents transition dynamics between turbulent and DL. It has been found that the correlation functions show power-law decay and their indices becomes smaller when AM is applied. This result suggests that not only fraction of the turbulence but also fluctuations are suppressed by the resonant controlling.