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nlin.CD2005
Lyapunov spectra of billiards with cylindrical scatterers: comparison with many-particle systems
Astrid S. de Wijn
The dynamics of a system consisting of many spherical hard particles can be described as a single point particle moving in a high-dimensional space with fixed hypercylindrical scat…
nlin.CD2004
The Kolmogorov-Sinai entropy for dilute systems of hard particles in equilibrium
Astrid S. de Wijn
In an equilibrium system, the Kolmogorov-Sinai entropy, , equals the sum of the positive Lyapunov exponents, the exponential rates of divergence of infinitesimal p…
nlin.CD2003
Goldstone modes in Lyapunov spectra of hard sphere systems
Astrid S. de Wijn, Henk van Beijeren
In this paper, we demonstrate how the Lyapunov exponents close to zero of a system of many hard spheres can be described as Goldstone modes, by using a Boltzmann type of approach.…