Controlling Synthetic Spin-Orbit Coupling in a Silicon Quantum Dot with Magnetic Field
| Autor: | Zhang, Xin, Zhou, Yuan, Hu, Rui-Zi, Ma, Rong-Long, Ni, Ming, Wang, Ke, Luo, Gang, Cao, Gang, Wang, Gui-Lei, Huang, Peihao, Hu, Xuedong, Jiang, Hong-Wen, Li, Hai-Ou, Guo, Guang-Can, Guo, Guo-Ping |
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| Rok vydání: | 2020 |
| Předmět: | |
| Zdroj: | Phys. Rev. Applied 15, 044042 (2021) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1103/PhysRevApplied.15.044042 |
| Popis: | 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. Comment: 26 pages, 10 figures |
| Databáze: | arXiv |
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