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We report on ac-driven electroconvection (EC) in a nematic liquid crystal (NLC) under superposed multiplicative noise; the EC system consists of a thin layer (d = 10–100 µm) of an NLC in an applied electric field. Ac-driven traveling waves (TWs) have been one of attractive EC showing a Hopf bifurcation, which have been well explained by a weak-electrolyte model. In this paper, noise-induced traveling...
We report noise-induced threshold shifts in ac-driven electroconvection (EC) in nematic liquid crystals (NLCs). It has been known that noise plays a role in stabilization (fc > fc*) or destabilization (fc < fc*) effects on EC depending on its cutoff frequencies fc; therefore, these effects monotonically increase (fc > fc*) or decrease (fc < fc*) the EC threshold Vc. However, we have found...
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