UCL logo

UCL Discovery

UCL home » Library Services » Electronic resources » UCL Discovery

Si-29 nuclear spins as a resource for donor spin qubits in silicon

Wolfowicz, G; Mortemousque, P-A; Guichard, R; Simmons, S; Thewalt, MLW; Itoh, KM; Morton, JJL; (2016) Si-29 nuclear spins as a resource for donor spin qubits in silicon. New Journal of Physics , 18 , Article ARTN 023. 10.1088/1367-2630/18/2/023021. Green open access

[img] Text
njp_18_2_023021.pdf - ["content_typename_Published version" not defined]

Download (781kB)

Abstract

Nuclear spin registers in the vicinity of electron spins in solid state systems offer a powerful resource to address the challenge of scalability in quantum architectures. We investigate here the properties of 29Si nuclear spins surrounding donor atoms in silicon, and consider the use of such spins, combined with the donor nuclear spin, as a quantum register coupled to the donor electron spin. We find the coherence of the nearby 29Si nuclear spins is effectively protected by the presence of the donor electron spin, leading to coherence times in the second timescale—over two orders of magnitude greater than the coherence times in bulk silicon. We theoretically investigate the use of such a register for quantum error correction (QEC), including methods to protect nuclear spins from the ionisation/neutralisation of the donor, which is necessary for the re-initialisation of the ancillae qubits. This provides a route for multi-round QEC using donors in silicon.

Type: Article
Title: Si-29 nuclear spins as a resource for donor spin qubits in silicon
Open access status: An open access version is available from UCL Discovery
DOI: 10.1088/1367-2630/18/2/023021
Publisher version: http://dx.doi.org/10.1088/1367-2630/18/2/023021
Language: English
Additional information: Original content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
Keywords: nuclear spins, decoherence, quantum error correction, donors in silicon
UCL classification: UCL > Provost and Vice Provost Offices
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > London Centre for Nanotechnology
URI: http://discovery.ucl.ac.uk/id/eprint/1478527
Downloads since deposit
64Downloads
Download activity - last month
Download activity - last 12 months
Downloads by country - last 12 months

Archive Staff Only

View Item View Item