IFIMAR   20926
INSTITUTO DE INVESTIGACIONES FISICAS DE MAR DEL PLATA
Unidad Ejecutora - UE
artículos
Título:
Stochastic resonance between counterpropagating Bloch walls
Autor/es:
MATÍAS DELL'ERBA; GONZALO IZÚS; ROBERTO DEZA; HORACIO WIO
Revista:
EUROPEAN PHYSICAL JOURNAL D
Editorial:
SPRINGER
Referencias:
Año: 2010
ISSN:
1434-6060
Resumen:
The nonequilibrium Ising{Bloch front bifurcation of the FitzHugh{Nagumo model with nondif-fusing 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 oppositechiralities, 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.
rds']