Computer-automated tuning procedures for semiconductor quantum dot arrays

A. R. Mills, M. M. Feldman, C. Monical, P. J. Lewis, K. W. Larson, A. M. Mounce, J. R. Petta

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

As with any quantum computing platform, semiconductor quantum dot devices require sophisticated hardware and controls for operation. The increasing complexity of quantum dot devices necessitates the advancement of automated control software and image recognition techniques for rapidly evaluating charge stability diagrams. We use an image analysis toolbox developed in Python to automate the calibration of virtual gates, a process that previously involved a large amount of user intervention. Moreover, we show that straightforward feedback protocols can be used to simultaneously tune multiple tunnel couplings in a triple quantum dot in a computer automated fashion. Finally, we adopt the use of a "tunnel coupling lever arm" to model the interdot barrier gate response and discuss how it can be used to more rapidly tune interdot tunnel couplings to the gigahertz values that are compatible with exchange gates.

Original languageEnglish (US)
Article number113501
JournalApplied Physics Letters
Volume115
Issue number11
DOIs
StatePublished - Sep 9 2019

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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    Mills, A. R., Feldman, M. M., Monical, C., Lewis, P. J., Larson, K. W., Mounce, A. M., & Petta, J. R. (2019). Computer-automated tuning procedures for semiconductor quantum dot arrays. Applied Physics Letters, 115(11), [113501]. https://doi.org/10.1063/1.5121444