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nlin.CD2011★ 55 cited
The two-stage dynamics in the Fermi-Pasta-Ulam problem: from regular to diffusive behavior
Antonio Ponno, Helen Christodoulidi, Charalampos Skokos +1
A numerical and analytical study of the relaxation to equilibrium of both the Fermi-Pasta-Ulam (FPU) alpha-model and the integrable Toda model, when the fundamental mode is initial…
nlin.CD2011★ 24 cited
Weak chaos detection in the Fermi-Pasta-Ulam- system using -Gaussian statistics
Chris G. Antonopoulos, Helen Christodoulidi
We study numerically statistical distributions of sums of orbit coordinates, viewed as independent random variables in the spirit of the Central Limit Theorem, in weakly chaotic re…