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Michael Stewart (Fed)

Michael Stewart is an experimental physicist in the Atom Scale Device Group in the Nanoscale Device Characterization Division of the Physical Measurement Lab. His research is focused on building a realization of the Ampere from silicon single electron devices. Reaching this goal requires exploring and understanding different fabrication methods, materials, and measurement techniques and their impact on noise, yield, and pumping characteristics. His team works to fabricate devices with minimal variation while also designing measurement techniques which mitigate variation and noise to enable parallelization. These research areas and goals have strong overlap with semiconductor-based qubit development and Dr. Stewart’s team works closely with industry on ameliorating noise in qubits. Dr. Stewart graduated from Brown University with a M.S. and Ph.D. in physics and received his undergraduate degree in physics and mathematics from the University of Wisconsin - Madison. He has received a Bronze Medal from the Department of Commerce.

Projects

Silicon-based Quantum Ampere

Selected News

NIST-on-a-Chip: Quantum Ampere Standard

Publications

Statistical study and parallelization of multiplexed single-electron sources

Author(s)
S Norimoto, P See, N Schoinas, I Rungger, Tommy Boykin, Michael Stewart, J. P. Griffiths, C. Chen, D. A. Ritchie, M. Kataoka
Increasing electric current from a single-electron source is a main challenge in an effort to establish the standard of the ampere defined by the fixed value of

Multi-scale alignment to buried atom-scale devices using Kelvin probe force microscopy

Author(s)
Pradeep Namboodiri, Jonathan Wyrick, Gheorghe Stan, Xiqiao Wang, Fan Fei, Ranjit Kashid, Scott Schmucker, Richard Kasica, Bryan Barnes, Michael Stewart, Richard M. Silver
Fabrication of quantum devices by atomic scale patterning with a Scanning Tunneling Microscope (STM) has led to the development of single/few atom transistors
Created October 23, 2018, Updated February 7, 2025