Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2001-09-25
Physics
Condensed Matter
Statistical Mechanics
Invited Talk LAWNP01, Proceedings to be published in Physica D, RevTex, 9 pgs, 5 figures
Scientific paper
10.1016/S0167-2789(02)00508-0
A system of periodically coupled nonlinear phase oscillators submitted to both additive and multiplicative white noises has been recently shown to exhibit ratchetlike transport, negative zero-bias conductance, and anomalous hysteresis. These features stem from the "asymmetry" of the stationary probability distribution function, arising through a noise-induced nonequilibrium phase transition which is "reentrant" as a function of the multiplicative noise intensity. Using an explicit mean-field approximation we analyze the effect of the multiplicative noises being coloured, finding a contraction of the ordered phase (and a reentrance as a function of the coupling) on one hand, and a shift of the transition from anomalous to normal hysteresis inside this phase on the other.
Deza Roberto R.
Mangioni Sergio E.
Wio Horacio S.
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