INVESTIGADORES
DELL'ERBA Matias German
artículos
Título:
Stochastic resonance between counterpropagating Bloch walls
Autor/es:
M.G. DELL'ERBA, G.G. IZÚS, R.R. DEZA, AND H.S. WIO
Revista:
EUROPEAN PHYSICAL JOURNAL D
Editorial:
SPRINGER
Referencias:
Año: 2011 p. 103 - 108
ISSN:
1434-6060
Resumen:
The nonequilibrium Ising-Bloch front bifurcation of the FitzHugh-Nagumo model with nondiffusing inhibitor provides a beautiful instance of an extended bistable system made up of propagating (Bloch) fronts. Moreover, these fronts are chiral and parity-related, and the barrier between them is nonetheless but a stationary Ising front. By means of numerical simulation in the neighborhood of this bifurcation, we demonstrate the existence of stochastic resonance in the transition between Bloch fronts of opposite chiralities, when an additive noise is included. The signal-to-noise ratio is numerically observed to scale with the distance to the critical point. This scaling law is theoretically characterized in terms of an effective nonequilibrium potential.
