Microwave Spin Control of a Tin-Vacancy Qubit in Diamond
The negatively charged tin-vacancy (SnV–) center in diamond is a promising solid-state qubit for applications in quantum networking due to its high quantum efficiency, strong zero phonon emission, and reduced sensitivity to electrical noise. The SnV– has a large spin-orbit coupling, which allows for...
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Published in | Physical review. X Vol. 13; no. 3; p. 031022 |
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Main Authors | , , , , , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
United States
American Physical Society (APS)
30.08.2023
American Physical Society |
Subjects | |
Online Access | Get full text |
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Summary: | The negatively charged tin-vacancy (SnV–) center in diamond is a promising solid-state qubit for applications in quantum networking due to its high quantum efficiency, strong zero phonon emission, and reduced sensitivity to electrical noise. The SnV– has a large spin-orbit coupling, which allows for long spin lifetimes at elevated temperatures, but unfortunately suppresses the magnetic dipole transitions desired for quantum control. Here, by use of a naturally strained center, we overcome this limitation and achieve high-fidelity microwave spin control. We demonstrate a π-pulse fidelity of up to 99.51 ± 0.03 % and a Hahn-echo coherence time of $T$$^{echo}_{2}$ = 170.0 ± 2.8 μs, both the highest yet reported for SnV– platform. This performance comes without compromise to optical stability, and is demonstrated at 1.7 K where ample cooling power is available to mitigate drive-induced heating. These results pave the way for SnV– spins to be used as a building block for future quantum technologies. |
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Bibliography: | USDOE Hertz Fellowship Stanford Bloch Postdoctoral Fellowship Swiss National Science Foundation (SNSF) SC0020115; AC02-76SF00515 |
ISSN: | 2160-3308 2160-3308 |
DOI: | 10.1103/PhysRevX.13.031022 |