Article

Quantitative definition of patterns in soft-mode turbulence suppressing the Nambu-Goldstone mode.

Department of Applied Quantum Physics and Nuclear Engineering, Graduate School of Engineering, Kyushu University, Fukuoka 819-0395, Japan.
Physical Review E (impact factor: 2.26). 07/2011; 84(1 Pt 1):011709. pp.011709
Source: PubMed

ABSTRACT Chaotic patterns in electroconvection of homeotropic nematics, soft-mode turbulence (SMT), and the related spatiotemporal chaos (STC) are discussed, and the quantitative definition of the patterns is considered. The order parameter S, obtained directly from the 2D spectra of the patterns, is introduced. The contribution of the Nambu-Goldstone mode and the increase in pattern regularity under the influence of an external magnetic field H are evaluated. We propose a schematic phase diagram of STC patterns based on the value of S.

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Keywords

2D spectra
 
Chaotic patterns
 
external magnetic field H
 
Nambu-Goldstone mode
 
order parameter S
 
pattern regularity
 
quantitative definition
 
related spatiotemporal chaos
 
schematic phase diagram
 
soft-mode turbulence
 
STC patterns
 

Fahrudin Nugroho