Floquet scattering theory of quantum pumps

Details Floquet scattering theory of quantum pumps Floquet scattering theory of quantum pumps

2002-08-19

arxiv.org/abs/cond-mat/0208356v1

Phys.Rev.B v.66, 205320 (2002)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

11 pages, 5 figures

Scientific paper

10.1103/PhysRevB.66.205320

We develop the Floquet scattering theory for quantum mechanical pumping in mesoscopic conductors. The nonequilibrium distribution function, the dc charge and heat currents are investigated at arbitrary pumping amplitude and frequency. For mesoscopic samples with discrete spectrum we predict a sign reversal of the pumped current when the pump frequency is equal to the level spacing in the sample. This effect allows to measure the phase of the transmission coefficient through the mesoscopic sample. We discuss the necessary symmetry conditions (both spatial and temporal) for pumping.

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