Spin-EPR-pair separation by conveyor-mode single electron shuttling in Si/SiGe

Tom Struck, Mats Volmer, Lino Visser, Tobias Offermann, Ran Xue, Jhih-Sian Tu, Stefan Trellenkamp, Łukasz Cywiński, Hendrik Bluhm and Lars R. Schreiber ()
Additional contact information
Tom Struck: Forschungszentrum Jülich GmbH and RWTH Aachen University
Mats Volmer: Forschungszentrum Jülich GmbH and RWTH Aachen University
Lino Visser: Forschungszentrum Jülich GmbH and RWTH Aachen University
Tobias Offermann: Forschungszentrum Jülich GmbH and RWTH Aachen University
Ran Xue: Forschungszentrum Jülich GmbH and RWTH Aachen University
Jhih-Sian Tu: Helmholtz Nano Facility (HNF), Forschungszentrum Jülich
Stefan Trellenkamp: Helmholtz Nano Facility (HNF), Forschungszentrum Jülich
Łukasz Cywiński: Polish Academy of Sciences
Hendrik Bluhm: Forschungszentrum Jülich GmbH and RWTH Aachen University
Lars R. Schreiber: Forschungszentrum Jülich GmbH and RWTH Aachen University

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract Long-ranged coherent qubit coupling is a missing function block for scaling up spin qubit based quantum computing solutions. Spin-coherent conveyor-mode electron-shuttling could enable spin quantum-chips with scalable and sparse qubit-architecture. Its key feature is the operation by only few easily tuneable input terminals and compatibility with industrial gate-fabrication. Single electron shuttling in conveyor-mode in a 420 nm long quantum bus has been demonstrated previously. Here we investigate the spin coherence during conveyor-mode shuttling by separation and rejoining an Einstein-Podolsky-Rosen (EPR) spin-pair. Compared to previous work we boost the shuttle velocity by a factor of 10000. We observe a rising spin-qubit dephasing time with the longer shuttle distances due to motional narrowing and estimate the spin-shuttle infidelity due to dephasing to be 0.7% for a total shuttle distance of nominal 560 nm. Shuttling several loops up to an accumulated distance of 3.36 μm, spin-entanglement of the EPR pair is still detectable, giving good perspective for our approach of a shuttle-based scalable quantum computing architecture in silicon.

Date: 2024
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

Downloads: (external link)
https://www.nature.com/articles/s41467-024-45583-7 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:15:y:2024:i:1:d:10.1038_s41467-024-45583-7

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

DOI: 10.1038/s41467-024-45583-7

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 ().