2 papers
nlin.CD2016
Canonical superdiffusion and energy fluctuation divergence
Ken-ichi Okubo, Ken Umeno
We propose a noble physical model obtained from a Hamiltonian with periodic potential. This model is canonical, reversible and brings about chaotic superdiffusion with energy fluct…
nlin.CD2015
New chaos indicators for systems with extremely small Lyapunov exponents
Ken-ichi Okubo, Ken Umeno
We propose new chaos indicators for systems with extremely small positive Lyapunov exponents. These chaos indicators can firstly detect a sharp transition between the Arnold diffus…