High-Fidelity State Preparation, Quantum Control, and Readout of an Isotopically Enriched Silicon Spin Qubit

Published

December 12, 2022

Author(s)

Adam Mills, Charlie Guinn, Michael Gullans, Mayer Feldman, Anthony Sigillito, M. Rakher, J. Kerckhoff, A. C. Jackson, Jason Petta

Abstract

Quantum systems must be prepared, controlled, and measured with high fidelity in order to per- form complex quantum algorithms. Control fidelities have greatly improved in silicon spin qubits, but state preparation and readout fidelities have generally been poor. By operating with low electron temperatures and employing high-bandwidth cryogenic amplifiers, we demonstrate single qubit readout visibilities >99%, exceeding the threshold for quantum error correction. In the same device, we achieve average single qubit control fidelities >99.95%. Our results show that silicon spin qubits can be operated with high overall operation fidelity.

Citation

Physical Review Applied

Volume

18

Issue

6

Pub Type

Journals

Download Paper

https://doi.org/10.1103/PhysRevApplied.18.064028

Local Download

Keywords

silicon spin qubits, quantum tomography, quantum information processing

Citation

Mills, A. , Guinn, C. , Gullans, M. , Feldman, M. , Sigillito, A. , Rakher, M. , Kerckhoff, J. , Jackson, A. and Petta, J. (2022), High-Fidelity State Preparation, Quantum Control, and Readout of an Isotopically Enriched Silicon Spin Qubit, Physical Review Applied, [online], https://doi.org/10.1103/PhysRevApplied.18.064028, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=934632 (Accessed October 1, 2025)