title: Control of the Hopf-Turing transition by time-delayed global feedback in a reaction-diffusion system.
abstract: Application of time-delayed feedback is a practical method of controlling bifurcations in reaction-diffusion systems. It has been shown that for a suitable feedback strength, time delay beyond a threshold may induce spatiotemporal instabilities. For an appropriate parameter space with differential diffusivities of the activator-inhibitor species, delayed feedback may generate Turing instability via a Hopf-Turing transition, resulting in stationary patterns. This is explored by a theoretical scheme in a photosensitive chlorine dioxide-iodine-malonic acid reaction-diffusion system where the delayed feedback is externally tuned by photoillumination intensity. Our analytical results corroborate with direct numerical simulations.
authors.affiliation: Indian Association for the Cultivation of Science, Jadavpur, Kolkata, India. ghosh.pushpita@gmail.com
authors.forename: Pushpita
authors.initials: P
authors.lastname: Ghosh