Front propagation into an unstable state in a forced medium: Experiments and theory

K. Alfaro-Bittner, C. Castillo-Pinto, M. G. Clerc, G. González-Cortés, RENE GABRIEL ROJAS CORTES, M. Wilson

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Spatially forced systems can exhibit coexistence and a rich interface dynamics between manipulable states. We show here how the propagation speed of a front into an unstable state can be modified through periodic space forcing. Based on optical feedback, we set up a quasi-one-dimensional forced experiment in a liquid-crystal cell. When changing the forcing parameters, fronts exhibit a ratchet motion. Unexpectedly, the average speed of fronts decreases when the strength of the forcing increases. Close to molecular reorientation transition, an amplitude equation allows characterizing analytically and numerically the observed dynamics.

Original languageEnglish
Article number050201
JournalPhysical Review E
Volume98
Issue number5
DOIs
StatePublished - 7 Nov 2018

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