A coherent double-quantum-dot electron pump

Details A coherent double-quantum-dot electron pump A coherent double-quantum-dot electron pump

1997-07-30

arxiv.org/abs/cond-mat/9707310v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 4 Postscript Figures, uses epsf and psfig

Scientific paper

We have investigated the transport characteristics of an electron pump consisting of an asymmetric double quantum dot at zero bias voltage which is subject to electromagnetic radiation. Depending on the energies of the intermediate states in the pumping cycle, electrons can be transferred through the dots incoherently via sequential tunneling or coherently via co-tunneling. The dc transport through the system can be controlled by the frequency of the applied radiation. We concentrate on resonant tunneling peaks in the pumping current that are interesting to observe experimentally.

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