Floquet scattering in parametric electron pumps

Details Floquet scattering in parametric electron pumps Floquet scattering in parametric electron pumps

2002-08-06

arxiv.org/abs/cond-mat/0208099v1

Phys. Rev. B 66, 235304 (2002)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 7 figures

Scientific paper

10.1103/PhysRevB.66.235304

A Floquet scattering approach to parametric electron pumps is presented and compared with Brouwer's adiabatic scattering approach [Phys. Rev. B 58, R10135 (1998)] for a simple scattering model with two harmonically oscillating delta-function barriers. For small strength of oscillating potentials these two approaches give exactly equivalent results while for large strength, these clearly deviate from each other. The validity of the adiabatic theory is also discussed by using the Wigner delay time obtained from the Floquet scattering matrix.

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