Single-qubit anisotropy induced by micromagnet in Si-MOS quantum dot

Ning Chu; Xin Zhang; Rong-Long Ma; Zhen-Zhen Kong; Wei-Zhu Liao; Sheng-Kai Zhu; Chu Wang; Ao-Ran Li; Gui-Lei Wang; Gang Cao; Hai-Ou Li; Guo-Ping Guo

doi:10.35848/1882-0786/adaad7

Applied Physics Express (Jan 2025)

Single-qubit anisotropy induced by micromagnet in Si-MOS quantum dot

Ning Chu,
Xin Zhang,
Rong-Long Ma,
Zhen-Zhen Kong,
Wei-Zhu Liao,
Sheng-Kai Zhu,
Chu Wang,
Ao-Ran Li,
Gui-Lei Wang,
Gang Cao,
Hai-Ou Li,
Guo-Ping Guo

Affiliations

Ning Chu: CAS Key Laboratory of Quantum Information, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China; CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China
Xin Zhang: QuTech and Kavli Institute of Nanoscience, Delft University of Technology , Lorentzweg 1, 2628 CJ Delft, The Netherlands
Rong-Long Ma: CAS Key Laboratory of Quantum Information, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China; CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China
Zhen-Zhen Kong: Integrated Circuit Advanced Process R&D Center, Institute of Microelectronics, Chinese Academy of Sciences , Beijing 100029, People’s Republic of China
Wei-Zhu Liao: CAS Key Laboratory of Quantum Information, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China; CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China
Sheng-Kai Zhu: CAS Key Laboratory of Quantum Information, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China; CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China
Chu Wang: CAS Key Laboratory of Quantum Information, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China; CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China
Ao-Ran Li: CAS Key Laboratory of Quantum Information, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China; CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China
Gui-Lei Wang: Hefei National Laboratory, University of Science and Technology of China , Hefei 230088, People’s Republic of China; Beijing Superstring Academy of Memory Technology , Beijing 100176, People’s Republic of China
Gang Cao: CAS Key Laboratory of Quantum Information, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China; CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China; Hefei National Laboratory, University of Science and Technology of China , Hefei 230088, People’s Republic of China
Hai-Ou Li: CAS Key Laboratory of Quantum Information, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China; CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China; Hefei National Laboratory, University of Science and Technology of China , Hefei 230088, People’s Republic of China
Guo-Ping Guo: CAS Key Laboratory of Quantum Information, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China; CAS Center for Excellence in Quantum Information and Quantum Physics, University of Science and Technology of China , Hefei, Anhui 230026, People’s Republic of China; Hefei National Laboratory, University of Science and Technology of China , Hefei 230088, People’s Republic of China; Origin Quantum Computing Company Limited , Hefei, Anhui 230088, People’s Republic of China

DOI: https://doi.org/10.35848/1882-0786/adaad7
Journal volume & issue: Vol. 18, no. 1
p. 012006

Abstract

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Synthesized spin–orbit coupling (SSOC) is crucial for the operation of spin qubits in silicon quantum dot, as it address the challenge posed by the inherently weak intrinsic spin–orbit coupling in silicon. Here, we investigate the anisotropic properties of single spin qubit in silicon metal-oxide-semiconductor (Si-MOS) quantum dot and provide experimental evidence for the control of SSOC. Additionally, we experimentally demonstrate that tuning the operating point away from the conventional configuration can enhance the quality factor of the spin qubit. These findings lay a foundation for the realization of high-quality tunable spin–orbit qubits.

Published in Applied Physics Express

ISSN: 1882-0778 (Print); 1882-0786 (Online)
Publisher: IOP Publishing
Country of publisher: United Kingdom
LCC subjects: Science: Physics
Website: https://iopscience.iop.org/journal/1882-0786

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