Field Driven Thermostated System : A Non-Linear Multi-Baker Map

Details Field Driven Thermostated System : A Non-Linear Multi-Baker Map Field Driven Thermostated System : A Non-Linear Multi-Baker Map

1998-07-06

arxiv.org/abs/chao-dyn/9807011v2

Nonlinear Sciences

Chaotic Dynamics

6 pages + 5 figures, to appear in Phys. Rev. E

Scientific paper

10.1103/PhysRevE.59.364

In this paper, we discuss a simple model for a field driven, thermostated random walk that is constructed by a suitable generalization of a multi-baker map. The map is a usual multi-baker, but perturbed by a thermostated external field that has many of the properties of the fields used in systems with Gaussian thermostats. For small values of the driving field, the map is hyperbolic and has a unique SRB measure that we solve analytically to first order in the field parameter. We then compute the positive and negative Lyapunov exponents to second order and discuss their relation to the transport properties. For higher values of the parameter, this system becomes non-hyperbolic and posseses an attractive fixed point.

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