Self-tuning of threshold for a two-state system.
A two-state system (TSS) under time-periodic perturbations (to be regarded as input signals) is studied in connection with self-tuning (ST) of threshold and stochastic resonance (SR). By ST, we observe an improvement of the signal-to-noise ratio (SNR) in a weak-noise region. An analytic approach to a tuning equation reveals that SNR improvement is possible also for the large-noise region and this is demonstrated by Monte Carlo simulations of hopping processes in a TSS. ST and SR are discussed from a little more physical point of view of the energy transfer (dissipation) rate, which behaves in a similar way as the SNR. Finally ST is considered briefly for a double-well potential system, which is closely related to the TSS.
Seo
Boyoung
B
Department of Applied Mathematics and Physics, Graduate School of Informatics, Kyoto University, Kyoto 606-8501, Japan.
Krishnan
Raishma
R
Munakata
Toyonori
T