Microsoft Technology Licensing, LLC

John David Watson

Chetan Vasudeo Nayak

Roman Mykolayovych Lutchyn

Torsten Karzig

Georg Wolfgang Winkler

Sebastian Heedt

Gijsbertus De Lange

Dmitry Pikulin

Mason L Thomas

Bernard Van Heck

Esteban Adrian Martinez

Bas Nijholt

A method to evaluate a semiconductor-superconductor heterojunction for use in a qubit register of a topological quantum computer includes (a) measuring one or both of a radio-frequency (RF) junction admittance of the semiconductor-superconductor heterojunction and a sub-RF conductance including a non-local conductance of the semiconductor-superconductor heterojunction, to obtain mapping data and refinement data; (b) finding by analysis of the mapping data one or more regions of a parameter space consistent with an unbroken topological phase of the semiconductor-superconductor heterojunction; and (c) finding by analysis of the refinement data a boundary of the unbroken topological phase in the parameter space and a topological gap of the semiconductor-superconductor heterojunction for at least one of the one or more regions of the parameter space.

Pre-screening and tuning heterojunctions for topological quantum computer

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Delft, Netherlands

John David Watson