Stochastic System with Colored Noise and Absorbing States: Path Integral Solution

Details Stochastic System with Colored Noise and Absorbing States: Path Integral Solution Stochastic System with Colored Noise and Absorbing States: Path Integral Solution

2000-04-04

arxiv.org/abs/cond-mat/0004040v1

Physics

Condensed Matter

Statistical Mechanics

9 pages, 5 figures, LaTeX

Scientific paper

The behavior of the most probable values of the order parameter $x$ and the amplitude $\phi$ of conjugate force fluctuations is studied for a stochastic system with a colored multiplicative noise with absorbing states. The phase diagrams introduced as dependencies the noise self-correlation time vs temperature and noise growth velocity are defined. It is shown that phase half-plane $(x,\phi)$ can be split into isolated domains of large, intermediate, and small values of $x$. System behavior in these domains is studied by the probability represented as path integral. In the region $x\ll 1$, the trajectories converge to the point $x = \phi = 0$ for $0 < a < 1/2$ and to $x = 0$, $\phi\to\infty$ for $1/2 < a \le 1$. In the former case, the probability of realization of trajectories is finite, while in the latter case it is vanishingly small, and an absorbing state can be formed.

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