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Single spin qubit geometric gate in a silicon quantum dot
- Source :
- Phys. Rev. Applied 21, 014044 (2024)
- Publication Year :
- 2023
-
Abstract
- Preserving qubit coherence and maintaining high-fidelity qubit control under complex noise environment is an enduring challenge for scalable quantum computing. Here we demonstrate an addressable fault-tolerant single spin qubit with an average control fidelity of 99.12% via randomized benchmarking on a silicon quantum dot device with an integrated micromagnet. Its dephasing time T2* is 1.025 us and can be enlarged to 264 us by using the Hahn echo technique, reflecting strong low-frequency noise in our system. To break through the noise limitation, we introduce geometric quantum computing to obtain high control fidelity by exploiting its noise-resilient feature. However, the control fidelities of the geometric quantum gates are lower than 99%. According to our simulation, the noise-resilient feature of geometric quantum gates is masked by the heating effect. With further optimization to alleviate the heating effect, geometric quantum computing can be a potential approach to reproducibly achieving high-fidelity qubit control in a complex noise environment.<br />Comment: 10 pages, 8 figures
- Subjects :
- Condensed Matter - Mesoscale and Nanoscale Physics
Quantum Physics
Subjects
Details
- Database :
- arXiv
- Journal :
- Phys. Rev. Applied 21, 014044 (2024)
- Publication Type :
- Report
- Accession number :
- edsarx.2310.06569
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1103/PhysRevApplied.21.014044