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Nonlocal Control of Chemical Front Propagation in the Schlögl Model

Julien Siebert:


We investigate the dynamics of a paradigmatic model of a bistable reaction di ffusion system (known as the Schlögl model) under the eff ect of a non-local or time-delayed distributed noninvasive control. The system without control is known to exhibit a traveling front joining the two stable steady states, which is stable and travels in space at a constant velocity. Noninvasive control means that we do not change the spatially uniform steady states of the system. However, we may change their stability and for some critical control parameters we may obtain new spatial structures (Turing instability, travelling waves). In this talk, we will present some recent results on the e ffect of nonlocal spatial control for diff erent spatial integral kernels, and distributed-delay feedback control with various temporal kernels, and show that, depending upon the control parameters, the front may be accelerated, slowed down, or suppressed, or new spatio-temporal patterns may be generated.


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