Abstract
Effects of time-delayed-feedback on pattern formation are studied in symmetrical bistable media. The results show that the time delay alters the behavior of the front bifurcation remarkably. The critical point of the Nonequilibrium Ising-Bloch bifurcation is shifted, which results from the competition between the feedbacks of the two variables. The stability of the front to transverse perturbation is also changed by the time delay, leading to a transition between spiral and labyrinthine patterns. One can control the pattern formation in bistable media by using time-delayed-feedback.
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