Nonlinear Sciences – Chaotic Dynamics
Scientific paper
2011-05-05
Nonlinear Sciences
Chaotic Dynamics
14 pages, 13 figures
Scientific paper
We study chaotic behavior and diffusion in the 2D periodic Lorentz gas in the finite-horizon regime. The dynamical observable which we consider is the length of single particle's trajectories, which moves in a triangular array of rigid disks. To analyze the chaoticity of this system, we construct a matrix of the length of trajectories and perform a level spacing analysis of the spectrum of this matrix. We find that a universal behavior occurs both in level spacing distribution and spectral rigidity. In order to examine diffusion in this classical system, we investigate the variance of the length of trajectories versus number of collisions to disks. In the case where there is a finite-horizon, such a variance scales linearly with number of bounces. This shows that a normal diffusion exists and a central limit theorem is maintained in this regime.
Hosseinizadeh A.
Kr{ö}ger Helmut
Laprise J. F.
Melkonyan Gurgen
Zomorrodi Reza
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