Carl P. Dettmann, Edson D. Leonel
A particle diffuses in a lattice with periodically forced volume. In the finite horizon case with bounded distance between collisions and strongly chaotic dynamics, the velocity growth (Fermi acceleration) is well described by a linear Boltzmann equation, leading to an asymptotic universal non-Maxwellian velocity distribution scaling as v ~ t. The infinite horizon has intermittent dynamics which enhances the acceleration, leading to v ~ t ln t and a non-universal distribution.
View original:
http://arxiv.org/abs/1212.5482
No comments:
Post a Comment