Coherent control of a donor-molecule electron spin qubit in silicon

Lukas Fricke, Samuel J. Hile (), Ludwik Kranz, Yousun Chung, Yu He, Prasanna Pakkiam, Matthew G. House, Joris G. Keizer and Michelle Y. Simmons
Additional contact information
Lukas Fricke: University of New South Wales
Samuel J. Hile: University of New South Wales
Ludwik Kranz: University of New South Wales
Yousun Chung: University of New South Wales
Yu He: University of New South Wales
Prasanna Pakkiam: University of New South Wales
Matthew G. House: University of New South Wales
Joris G. Keizer: University of New South Wales
Michelle Y. Simmons: University of New South Wales

Nature Communications, 2021, vol. 12, issue 1, 1-6

Abstract: Abstract Donor spins in silicon provide a promising material platform for large scale quantum computing. Excellent electron spin coherence times of $${T}_{2}^{* }=268$$ T 2 * = 268 μs with fidelities of 99.9% have been demonstrated for isolated phosphorus donors in isotopically pure 28Si, where donors are local-area-implanted in a nanoscale MOS device. Despite robust single qubit gates, realising two-qubit exchange gates using this technique is challenging due to the statistical nature of the dopant implant and placement process. In parallel a precision scanning probe lithography route has been developed to place single donors and donor molecules on one atomic plane of silicon with high accuracy aligned to heavily phosphorus doped silicon in-plane gates. Recent results using this technique have demonstrated a fast (0.8 ns) two-qubit gate with two P donor molecules placed 13 nm apart in natSi. In this paper we demonstrate a single qubit gate with coherent oscillations of the electron spin on a P donor molecule in natSi patterned by scanning tunneling microscope (STM) lithography. The electron spin exhibits excellent coherence properties, with a $${T}_{2}$$ T 2 decoherence time of 298 ± 30 μs, and $${T}_{2}^{* }$$ T 2 * dephasing time of 295 ± 23 ns.

Date: 2021
References: Add references at CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.nature.com/articles/s41467-021-23662-3 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-23662-3

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-021-23662-3

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().