Speaker
Paolo Politi
(FI)
Description
Slow processes in physics are typically related to the existence of high (free)
energy barriers, which require strong fluctuations, or to nearly integrable
regions in the phase space, which determine a slow onset of equipartition.
In this talk we intend to discuss a different mechanism appearing in the
Discrete Nonlinear Schroedinger Equation (DNLSE), when we analyze the relaxation
of large excitations (breathers).
Relaxation occurs through a diffusive-type process and through an activated process:
the effectiveness of both mechanisms decreases exponentially with breather height.
Primary author
Paolo Politi
(FI)
