Controlling Synthetic Spin-Orbit Coupling in a Silicon Quantum Dot with Magnetic Field

Zhang，Xin1,2; Zhou，Yuan1,2; Hu，Rui Zi1,2; Ma，Rong Long1,2; Ni，Ming1,2; Wang，Ke1,2; Luo，Gang1,2; Cao，Gang1,2; Wang，Gui Lei3; Huang，Peihao4,5; Hu，Xuedong6; Jiang，Hong Wen7; Li，Hai Ou1,2; Guo，Guang Can1,2; Guo，Guo Ping1,2,8

2021-04-01

10.1103/PhysRevApplied.15.044042

Physical Review Applied   影响因子和分区

2331-7019

Tunable synthetic spin-orbit coupling (SSOC) is one of the key challenges in various quantum systems, such as ultracold atomic gases, topological superconductors, and semiconductor quantum dots. Here we experimentally demonstrate controlling the SSOC by investigating the anisotropy of spin-valley resonance in a silicon quantum dot. As we rotate the applied magnetic field in plane, we find a striking nonsinusoidal behavior of resonance amplitude that distinguishes SSOC from the intrinsic spin-orbit coupling (ISOC), and associate this behavior with the previously overlooked in-plane transverse magnetic field gradient. Moreover, by theoretically analyzing the experimentally measured SSOC field, we predict the quality factor of the spin qubit could be optimized if the orientation of the in-plane magnetic field is rotated away from the traditional working point.

SCI ; EI

英语

其他

WOS:000656827400001

20211910336898

Magnetic fields ; Nanocrystals ; Semiconductor quantum dots ; Silicon ; Spin fluctuations

Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Magnetism: Basic Concepts and Phenomena:701.2 ; Semiconductor Devices and Integrated Circuits:714.2 ; Nanotechnology:761 ; Atomic and Molecular Physics:931.3

2-s2.0-85105396990

Scopus

1.CAS Key Laboratory of Quantum Information,University of Science and Technology of China,Hefei, Anhui,230026,China
2.CAS Ctr. for Excellence and Synergetic Innovation Center in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei, Anhui,20026,China
3.Key Laboratory of Microelectronics Devices and Integrated Technology,Institute of Microelectronics,Chinese Academy of Sciences,Beijing,100029,China
4.Shenzhen Institute for Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
5.Guangdong Provincial Key Laboratory of Quantum Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
6.Department of Physics,University at Buffalo,SUNY,Buffalo,14260,United States
7.Department of Physics and Astronomy,University of California,Los Angeles,90095,United States
8.Origin Quantum Computing Company Limited,Hefei, Anhui,230026,China

Zhang，Xin,Zhou，Yuan,Hu，Rui Zi,et al. Controlling Synthetic Spin-Orbit Coupling in a Silicon Quantum Dot with Magnetic Field[J]. Physical Review Applied,2021,15(4).

Zhang，Xin.,Zhou，Yuan.,Hu，Rui Zi.,Ma，Rong Long.,Ni，Ming.,...&Guo，Guo Ping.(2021).Controlling Synthetic Spin-Orbit Coupling in a Silicon Quantum Dot with Magnetic Field.Physical Review Applied,15(4).

Zhang，Xin,et al."Controlling Synthetic Spin-Orbit Coupling in a Silicon Quantum Dot with Magnetic Field".Physical Review Applied 15.4(2021).