1. Forced Synchronization of Electroconvective Roll Oscillations in Nematic Liquid Crystals
- Author
-
Alexei Krekhov, E. S. Batyrshin, and O. A. Skaldin
- Subjects
Physics ,Forcing (recursion theory) ,Condensed matter physics ,Solid-state physics ,Phase (waves) ,General Physics and Astronomy ,01 natural sciences ,Action (physics) ,010305 fluids & plasmas ,Synchronization (alternating current) ,Liquid crystal ,Electric field ,0103 physical sciences ,Ising model ,010306 general physics - Abstract
The forced phase locking in a system of the oscillating electroconvective rolls that form in a nematic liquid crystal layer in a dc electric field is studied. As a result of the action of an additive ac electric field with a small amplitude, the system of oscillators is found to be divided into clusters, where oscillations are fully phase locked. The electroconvective rolls in neighboring clusters oscillate in antiphase and the clusters are separated by Ising walls. The phase locking is shown to be maximal at the forcing frequency that is close to the double frequency of the natural oscillations of rolls. A model is proposed to describe spatially distributed phase oscillators, and it takes into account the symmetries of a system of electroconvective rolls and external forcing. The results of numerical simulations agree well with the experimental data.
- Published
- 2018