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Controlling Synthetic Spin-Orbit Coupling in a Silicon Quantum Dot with Magnetic Field
- Source :
- Phys. Rev. Applied 15, 044042 (2021)
- Publication Year :
- 2020
-
Abstract
- Tunable synthetic spin-orbit coupling (s-SOC) 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 s-SOC 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 s-SOC from the intrinsic spin-orbit coupling (i-SOC), and associate this behavior with the previously overlooked in-plane transverse magnetic field gradient. Moreover, by theoretically analyzing the experimentally measured s-SOC 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.<br />Comment: 26 pages, 10 figures
- Subjects :
- Condensed Matter - Mesoscale and Nanoscale Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Applied 15, 044042 (2021)
- Publication Type :
- Report
- Accession number :
- edsarx.2012.14636
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevApplied.15.044042