Séminaire / Seminar GReCO |
| « Perturbations stochastiques des systèmes intégrables : une fenêtre vers les systèmes faiblement chaotiques. » |
|
J. Kurchan |
|
Integrable non-linear Hamiltonian systems perturbed by additive noise
develop a Lyapunov instability, and are hence chaotic, for any amplitude of the perturbation. The situation described here being `multi-resonance' -- by nature well beyond the Kolmogorov-Arnold-Moser and the Nekhoroshev regimes -- it offers an analytic glimpse on the situation in which many near-integrable systems, such as some planetary systems, find themselves in practice. |
|
lundi 5 janvier 2015 - 11:00 Salle des séminaires Évry Schatzman Institut d'Astrophysique de Paris |
| Pages web du séminaire / Seminar's webpage |