Dynamical thermalization of disordered nonlinear lattices.
We study numerically how the energy spreads over a finite disordered nonlinear one-dimensional lattice, where all linear modes are exponentially localized by disorder. We establish emergence of dynamical thermalization characterized as an ergodic chaotic dynamical state with a Gibbs distribution over the modes. Our results show that the fraction of thermalizing modes is finite and grows with the nonlinearity strength.
Mulansky
Mario
M
Department of Physics and Astronomy, Potsdam University, Karl-Liebknecht-Strasse 24, D-14476 Potsdam-Golm, Germany.
Ahnert
Karsten
K
Pikovsky
Arkady
A
Shepelyansky
Dima L
DL