| Issue |
Europhys. Lett.
Volume 56, Number 3, November 2001
|
|
|---|---|---|
| Page(s) | 333 - 339 | |
| Section | General | |
| DOI | https://doi.org/10.1209/epl/i2001-00524-7 | |
| Published online | 01 December 2003 | |
Double stochastic resonance peaks in systems with dynamic phase transitions
1
Department of Theoretical Physics, Umeå University -
901 87 Umeå, Sweden
2
Department of Physics, Seoul National University -
Seoul 151-742, Korea
3
Center for Strongly Correlated Materials Research,
Seoul National University Seoul 151-742, Korea
Corresponding author: kim@tp.umu.se
Received:
1
June
2001
Accepted:
10
August
2001
To probe the connection between the dynamic phase transition and stochastic resonance, we study the mean-field kinetic Ising model and the two-dimensional Josephson-junction array in the presence of appropriate oscillating magnetic fields. Observed in both systems are double stochastic resonance peaks, one below and the other above the dynamic transition temperature, the appearance of which is argued to be a generic property of the system with a continuous dynamic phase transition. In particular, the frequency matching condition around the dynamic phase transition between the external drive frequency and the internal characteristic frequency of the system is identified as the origin of such double peaks.
PACS: 05.40.-a – Fluctuation phenomena, random processes, noise, and Brownian motion / 74.50.+r – Proximity effects, weak links, tunneling phenomena, and Josephson effects / 75.10.Hk – Classical spin models
© EDP Sciences, 2001
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