Stochastic Resonance in a Dipole

TL;DR

This paper demonstrates that a dipole system exhibits stochastic resonance, with a maximum signal-to-noise ratio at a specific noise level and oscillating field amplitude, in both fixed and switching potential scenarios.

Contribution

It reveals stochastic resonance in dipole systems under different potential conditions, expanding understanding of noise effects in relaxation phenomena.

Findings

Maximum SNR occurs at a non-zero noise level.

Resonance observed in fixed and switching potential cases.

Optimal oscillating field amplitude identified.

Abstract

We show that the dipole, a system usually proposed to model relaxation phenomena, exhibits a maximum in the signal-to-noise ratio at a non-zero noise level, thus indicating the appearance of stochastic resonance. The phenomenon occurs in two different situations, i.e. when the minimum of the potential of the dipole remains fixed in time and when it switches periodically between two equilibrium points. We have also found that the signal-to-noise ratio has a maximum for a certain value of the amplitude of the oscillating field.