Three-waveform bidirectional pumping of single electrons with a silicon quantum dot

Research output: Contribution to journalArticleScientificpeer-review

Researchers

Research units

  • University of New South Wales
  • University of Cambridge

Abstract

Semiconductor-based quantum dot single-electron pumps are currently the most promising candidates for the direct realization of the emerging quantum standard of the ampere in the International System of Units. Here, we discuss a silicon quantum dot single-electron pump with radio frequency control over the transparencies of entrance and exit barriers as well as the dot potential. We show that our driving protocol leads to robust bidirectional pumping: one can conveniently reverse the direction of the quantized current by changing only the phase shift of one driving waveform with respect to the others. We anticipate that this pumping technique may be used in the future to perform error counting experiments by pumping the electrons into and out of a reservoir island monitored by a charge sensor.

Details

Original languageEnglish
Article number36381
Pages (from-to)1-7
JournalScientific Reports
Volume6
Publication statusPublished - 8 Nov 2016
MoE publication typeA1 Journal article-refereed

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