Europhys. Lett.
Volume 70, Number 4, May 2005
Page(s) 432 - 438
Section General
Published online 20 April 2005
Europhys. Lett., 70 (4), pp. 432-438 (2005)
DOI: 10.1209/epl/i2005-10021-7

Characterization of stochastic resonance

K. Park1 and Y.-C. Lai2

1  Department of Mathematics, Arizona State University - Tempe, AZ 85287, USA
2  Departments of Electrical Engineering and Physics, Arizona State University Tempe, AZ 85287, USA

received 3 February 2005; accepted in final form 31 March 2005
published online 20 April 2005

Traditional quantities used to characterize stochastic resonance possess the common feature of low sensitivity to noise variation in the sense that they vary slowly about the optimal noise level. In potential applications of stochastic resonance such as device development, a high sensitivity to noise may be required. Here we show that, when the resonance is understood as a manifestation of phase synchronization, the average synchronization time between the input and output signal has an extremely high sensitivity in that it exhibits a cusp-like behavior about the optimal noise level. Theoretical analysis and numerical evidence are provided to establish the cusp-like behavior and its generality.

05.40.-a - Fluctuation phenomena, random processes, noise, and Brownian motion.
02.50.Ey - Stochastic processes.

© EDP Sciences 2005