An Adiabatic Quantum Electron Pump

Details An Adiabatic Quantum Electron Pump An Adiabatic Quantum Electron Pump

1999-04-16

arxiv.org/abs/cond-mat/9904238v1

Science 283, 1905 (1999)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

10 pages, 5 figures

Scientific paper

10.1126/science.283.5409.1905

A quantum pumping mechanism which produces dc current or voltage in response to a cyclic deformation of the confining potential in an open quantum dot is reported. The voltage produced at zero current bias is sinusoidal in the phase difference between the two ac voltages deforming the potential and shows random fluctuations in amplitude and direction with small changes in external parameters such as magnetic field. The amplitude of the pumping response increases linearly with the frequency of the deformation. Dependencies of pumping on the strength of the deformations, temperature, and breaking of time-reversal symmetry are also investigated.

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