Bulletin of the American Physical Society
APS March Meeting 2024
Monday–Friday, March 4–8, 2024; Minneapolis & Virtual
Session M46: Silicon Qubits II - Donor Qubits in Silicon
8:00 AM–10:24 AM,
Wednesday, March 6, 2024
Room: 200AB
Sponsoring
Unit:
DQI
Chair: Arne Laucht, 1) University of New South Wales, 2) Diraq Pty. Ltd.
Abstract: M46.00007 : Probing Localized Charge States in Atom-based Silicon Quantum dot Arrays using RF Reflectometry
9:36 AM–9:48 AM
Presenter:
Fan Fei
(University of Maryland, College Park)
Authors:
Fan Fei
(University of Maryland, College Park)
Xiqiao Wang
(University of Maryland, College Park)
Ehsan Khatami
(San Jose State University)
Jonathan Wyrick
(National Institute of Standards and Tech)
Pradeep N Namboodiri
(NIST)
FNU Utsav
(NIST)
Brian Courts
(University of Maryland, College Park)
Albert F Rigosi
(National Institute of Standards and Technology)
Richard M Silver
(NIST)
In this talk, we show transport and RF reflectometry measurements on dopant arrays (2x2 and 3x3) to extract charge occupation. Localized charge states may show little or no conductance but can be revealed by RF reflectometry measurements with a LC tank circuit attached to the source. We extract the energy addition spectrum for these states and explore the spin-filling sequence within the arrays. Using an extended Hubbard model, we simulate the spin/charge occupation, the spatial distribution of the many-body states and the electron addition energy spectrum with realistic disorder.
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