Jm. Casado et al., COMMENTS ON STOCHASTIC RESONANCE IN A PERIODIC POTENTIAL SYSTEM UNDERA CONSTANT DRIVING-FORCE, Physics letters. A, 197(4), 1995, pp. 365-366
We discuss the recently suggested possibility of observing stochastic
resonance (SR) effects in the long time response of a stochastic syste
m moving in a periodic potential under the action of a weak constant f
orce [G. Hu, Phys. Lett. A 174 (1993) 247] and we show that SR effects
do not exist within the Langevin description of the dynamics.