Learning Coulomb diamonds in large quantum dot arrays

Oswin Krause*, Anasua Chatterjee, Ferdinand Kuemmeth, Evert van Nieuwenburg

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

3 Citations (Scopus)
25 Downloads (Pure)

Abstract

We introduce an algorithm that is able to find the facets of Coulomb diamonds in quantum dot arrays. We simulate these arrays using the constant-interaction model, and rely only on one-dimensional raster scans (rays) to learn a model of the device using regularized maximum likelihood estimation. This allows us to determine, for a given charge state of the device, which transitions exist and what the compensated gate voltages for these are. For smaller devices the simulator can also be used to compute the exact boundaries of the Coulomb diamonds, which we use to assess that our algorithm correctly finds the vast majority of transitions with high precision.

Original languageEnglish
Article number084
JournalSciPost Physics
Volume13
Issue number4
Number of pages24
ISSN2542-4653
DOIs
Publication statusPublished - 2022

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