INSTITUTO DE INVESTIGACIONES FISICAS DE MAR DEL PLATA
Unidad Ejecutora - UE
Stochastic resonance between propagating extended attractors
M. G. DELL'ERBA, G. G. IZÚS, R. R. DEZA, Y H. S. WIO
AIP CONFERENCE PROCEEDINGS
AIP Conf. Proc.
Año: 2011 p. 214 - 214
The nonequilibrium IsingBloch (NIB) bifurcation of the FitzHughNagumo (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.