Parallel quantized charge pumping

Details Parallel quantized charge pumping Parallel quantized charge pumping

2009-06-29

arxiv.org/abs/0906.5384v5

Phys. Rev. B 80, 113303 (2009)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

Two quantized charge pumps are operated in parallel. The total current generated is shown to be far more accurate than the current produced with just one pump operating at a higher frequency. With the application of a perpendicular magnetic field the accuracy of quantization is shown to be $< $20 ppm for a current of $108.9 $pA. The scheme for parallel pumping presented in this work has applications in quantum information processing, the generation of single photons in pairs and bunches, neural networking and the development of a quantum standard for electrical current. All these applications will benefit greatly from the increase in output current without the characteristic decrease in accuracy as a result of high-frequency operation.

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