Trapping dynamics with gated traps: stochastic resonance-like phenomenon

ALEJANDRO D. SÁNCHEZ, JORGE A. REVELLI, HORACIO S. WIO

PHYSICS LETTERS A

ELSEVIER Science B. V

Año: 2000 vol. 277 p. 304 - 309

0375-9601

We present a simple one-dimensional trapping model prompted by the problem of ion current across biological membranes. The trap is modeled mimicking the ionic channel behaviour. Such voltage-sensitive channels are open or closed depending on the value taken by a potential. Here we have assumed that the external potential has two contributions: a deterministic periodic and a stochastic one. Our model shows a resonant-like maximum when we plot the amplitude of the oscillations in the absorption current vs. noise intensity. the model was solved both numerically and using analytic approximation and was found to be in good accord with numerical simulations.