Caroli, B.; Caroli, C.; Roulet, B. - In: Physica A: Statistical Mechanics and its Applications 112 (1982) 3, pp. 517-522
We show that, for systems described by non-linear first- and second-order Langevin equations, the high-frequency correlations always have respectively, an ω−2 and ω−4 asymptotic behavior, irrespective of the shape and strength of the non-linearities, and whether detailed balance is obeyed...