Glassy dynamics in relaxation of soft-mode turbulence
Fahrudin Nugroho, Takayuki Narumi, Yoshiki Hidaka, Junichi Yoshitani,, Masaru Suzuki, Shoichi Kai
TL;DR
This paper investigates the relaxation dynamics of soft-mode turbulence in nematic liquid crystals, revealing non-exponential relaxation behaviors and linking them to glass-like dynamics and coherent motion contributions.
Contribution
It introduces a compressed exponential model for SMT relaxation and connects the characteristic time to the electroconvection control parameter, highlighting glassy dynamics.
Findings
Relaxation near threshold deviates from exponential behavior.
Compressed exponential describes SMT relaxation.
Characteristic time inversely proportional to control parameter.
Abstract
The autocorrelation function of pattern fluctuation is used to study soft-mode turbulence (SMT), a spatiotemporal chaos observed in homeotropic nematics. We show that relaxation near the electroconvection threshold deviates from the exponential. To describe this relaxation, we propose a compressed exponential appearing in dynamics of glass forming liquids. Our findings suggest that coherent motion contributes to SMT dynamics. We also confirmed that characteristic time is inversely proportional to electroconvection's control parameter.
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