title: Quantitative definition of patterns in soft-mode turbulence suppressing the Nambu-Goldstone mode.
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.
authors.affiliation: Department of Applied Quantum Physics and Nuclear Engineering, Graduate School of Engineering, Kyushu University, Fukuoka 819-0395, Japan. fahrudin@athena.ap.kyushu-u.ac.jp
authors.forename: Fahrudin
authors.initials: F
authors.lastname: Nugroho
authors.forename: Tatsuhiro
authors.initials: T
authors.lastname: Ueki
authors.forename: Rinto
authors.initials: R
authors.lastname: Anugraha
authors.forename: Yoshiki
authors.initials: Y
authors.lastname: Hidaka
authors.forename: Shoichi
authors.initials: S
authors.lastname: Kai