| Issue |
EPL
Volume 98, Number 3, May 2012
|
|
|---|---|---|
| Article Number | 38001 | |
| Number of page(s) | 6 | |
| Section | Interdisciplinary Physics and Related Areas of Science and Technology | |
| DOI | https://doi.org/10.1209/0295-5075/98/38001 | |
| Published online | 04 May 2012 | |
Non-adiabatic pumping in an oscillating-piston model
1
Department of Physics, Ben-Gurion University of the Negev - Beer-Sheva 84105, Israel
2
Departamento de Física, Universidad Nacional de Colombia - Bogotá D.C., Colombia
3
CeiBA - Complejidad - Bogotá D.C., Colombia
Received:
20
February
2012
Accepted:
2
April
2012
We consider the prototypical “piston pump” operating on a ring, where a circulating current is induced by means of an AC driving. This can be regarded as a generalized Fermi-Ulam model, incorporating a finite-height moving wall (piston) and non-trivial topology (ring). The amount of particles transported per cycle is determined by a layered structure of phase space. Each layer is characterized by a different drift velocity. We discuss the differences compared with the adiabatic and Boltzmann pictures, and highlight the significance of the “diabatic” contribution that might lead to a counter-stirring effect.
PACS: 87.15.hj – Transport dynamics / 05.45.Mt – Quantum chaos; semiclassical methods / 73.23.-b – Electronic transport in mesoscopic systems
© EPLA, 2012
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