Semiclassical theory of a quantum pump
| dc.creator | Rahav, Saar | |
| dc.creator | Brouwer, Piet W. | |
| dc.date | 2006-07-17 | |
| dc.date | 2006-11-27 | |
| dc.date.accessioned | 2026-07-07T07:16:03Z | |
| dc.date.available | 2026-07-07T07:16:03Z | |
| dc.description | In a quantum charge pump, the periodic variation of two parameters that affect the phase of the electronic wavefunction causes the flow of a direct current. The operating mechanism of a quantum pump is based on quantum interference, the phases of interfering amplitudes being modulated by the external parameters. In a ballistic quantum dot, there is a minimum time before which quantum interference can not occur: the Ehrenfest time. Here we calculate the current pumped through a ballistic quantum dot when the Ehrenfest time is comparable to the mean dwell time. Remarkably, we find that the pumped current has a component that is not suppressed if the Ehrenfest time is much larger than the mean dwell time. | |
| dc.description | 14 pages, 8 figures. Revised version, minor changes | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0607425 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0607425 | |
| dc.identifier | Phys. Rev. B, v74, 205327 (2006) | |
| dc.identifier | doi:10.1103/PhysRevB.74.205327 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/113443 | |
| dc.subject | Mesoscale and Nanoscale Physics | |
| dc.title | Semiclassical theory of a quantum pump | |
| dc.type | text |