Ultrafast coherent control of a hole spin qubit in a germanium quantum dot

Ke Wang, Gang Xu, Fei Gao, He Liu, Rong-Long Ma, Xin Zhang, Zhanning Wang, Gang Cao, Ting Wang, Jian-Jun Zhang (), Dimitrie Culcer, Xuedong Hu, Hong-Wen Jiang, Hai-Ou Li (), Guang-Can Guo and Guo-Ping Guo ()
Additional contact information
Ke Wang: University of Science and Technology of China
Gang Xu: University of Science and Technology of China
Fei Gao: Chinese Academy of Sciences
He Liu: University of Science and Technology of China
Rong-Long Ma: University of Science and Technology of China
Xin Zhang: University of Science and Technology of China
Zhanning Wang: University of New South Wales
Gang Cao: University of Science and Technology of China
Ting Wang: Chinese Academy of Sciences
Jian-Jun Zhang: Chinese Academy of Sciences
Dimitrie Culcer: University of New South Wales
Xuedong Hu: University at Buffalo, SUNY
Hong-Wen Jiang: University of California
Hai-Ou Li: University of Science and Technology of China
Guang-Can Guo: University of Science and Technology of China
Guo-Ping Guo: University of Science and Technology of China

Nature Communications, 2022, vol. 13, issue 1, 1-6

Abstract: Abstract Operation speed and coherence time are two core measures for the viability of a qubit. Strong spin-orbit interaction (SOI) and relatively weak hyperfine interaction make holes in germanium (Ge) intriguing candidates for spin qubits with rapid, all-electrical coherent control. Here we report ultrafast single-spin manipulation in a hole-based double quantum dot in a germanium hut wire (GHW). Mediated by the strong SOI, a Rabi frequency exceeding 540 MHz is observed at a magnetic field of 100 mT, setting a record for ultrafast spin qubit control in semiconductor systems. We demonstrate that the strong SOI of heavy holes (HHs) in our GHW, characterized by a very short spin-orbit length of 1.5 nm, enables the rapid gate operations we accomplish. Our results demonstrate the potential of ultrafast coherent control of hole spin qubits to meet the requirement of DiVincenzo’s criteria for a scalable quantum information processor.

Date: 2022
References: View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.nature.com/articles/s41467-021-27880-7 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:13:y:2022:i:1:d:10.1038_s41467-021-27880-7

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

DOI: 10.1038/s41467-021-27880-7

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 ().