Abstract
A gas of noninteracting particles diffuses in a lattice of pulsating scatterers. In the finite horizon case with bounded distance between collisions and strongly chaotic dynamics, the velocity growth (Fermi acceleration) is well described by a master equation, leading to an asymptotic universal non-Maxwellian velocity distribution scaling as v ~ t. The infinite horizon case has intermittent dynamics which enhances the acceleration, leading to v ~ t ln t and a non-universal distribution.
Original language | English |
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Article number | 40003 |
Number of pages | 6 |
Journal | EPL |
Volume | 103 |
Issue number | 4 |
DOIs | |
Publication status | Published - Aug 2013 |
Keywords
- LORENTZ GAS
- PARTICLES
- DIFFUSION
- TRANSPORT
- ESCAPE
- nlin.CD
- math-ph
- math.MP