Phys. Rev. B 80, 113303 (2009) [4 pages]Parallel quantized charge pumpingReceived 1 July 2009; revised 5 August 2009; published 16 September 2009 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. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.80.113303
DOI:
10.1103/PhysRevB.80.113303
PACS:
73.63.−b, 71.55.Eq, 73.21.La, 73.63.Nm
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