IFIMAR   20926
INSTITUTO DE INVESTIGACIONES FISICAS DE MAR DEL PLATA
Unidad Ejecutora - UE
artículos
Título:
Stochastic resonance between propagating extended attractors
Autor/es:
M. G. DELL'ERBA, G. G. IZÚS, R. R. DEZA, Y H. S. WIO
Revista:
AIP CONFERENCE PROCEEDINGS
Editorial:
AIP Conf. Proc.
Referencias:
Año: 2011 p. 214 - 214
ISSN:
0094-243X
Resumen:
The nonequilibrium Ising–Bloch (NIB) bifurcation of the FitzHugh–Nagumo (FHN)model with nondiffusing inhibitor provides a beautiful instance of an extended bistable systemwith counterpropagating fronts or Bloch walls (BW) as stable attractors. Moreover, these frontsare chiral and parity-related, and the barrier between them is the unstable stationary front or Isingwall (IW). Here we show by means of numerical simulation the presence of stochastic resonance inthe transition between 1D BW of opposite chiralities when an additive noise is included. A scalinglaw of the signal-to-noise ratio (SNR) with the distance to the critical point is numerically observedand theoretically characterized in terms of an effective nonequilibrium potential.
rds']