Optical spin locking of a solid-state qubit. Bodey, J. H., Stockill, R., Denning, E. V., Gangloff, D. A., Éthier-Majcher, G., Jackson, D. M., Clarke, E., Hugues, M., Gall, C. L., & Atatüre, M. npj Quantum Information, 5(1):95, December, 2019. ![Optical spin locking of a solid-state qubit [link]](https://bibbase.org/img/filetypes/link.svg "link")
Paper doi abstract bibtex Abstract Quantum control of solid-state spin qubits typically involves pulses in the microwave domain, drawing from the well-developed toolbox of magnetic resonance spectroscopy. Driving a solid-state spin by optical means offers a high-speed alternative, which in the presence of limited spin coherence makes it the preferred approach for high-fidelity quantum control. Bringing the full versatility of magnetic spin resonance to the optical domain requires full phase and amplitude control of the optical fields. Here, we imprint a programmable microwave sequence onto a laser field and perform electron spin resonance in a semiconductor quantum dot via a two-photon Raman process. We show that this approach yields full SU(2) spin control with over $$98 \%$$ 98 % $$\pi$$ π -rotation fidelity. We then demonstrate its versatility by implementing a particular multi-axis control sequence, known as spin locking. Combined with electron-nuclear Hartmann–Hahn resonances which we also report in this work, this sequence will enable efficient coherent transfer of a quantum state from the electron spin to the mesoscopic nuclear ensemble.
@article{bodey_optical_2019,
title = {Optical spin locking of a solid-state qubit},
volume = {5},
issn = {2056-6387},
url = {http://www.nature.com/articles/s41534-019-0206-3},
doi = {10.1038/s41534-019-0206-3},
abstract = {Abstract
Quantum control of solid-state spin qubits typically involves pulses in the microwave domain, drawing from the well-developed toolbox of magnetic resonance spectroscopy. Driving a solid-state spin by optical means offers a high-speed alternative, which in the presence of limited spin coherence makes it the preferred approach for high-fidelity quantum control. Bringing the full versatility of magnetic spin resonance to the optical domain requires full phase and amplitude control of the optical fields. Here, we imprint a programmable microwave sequence onto a laser field and perform electron spin resonance in a semiconductor quantum dot via a two-photon Raman process. We show that this approach yields full SU(2) spin control with over
\$\$98 {\textbackslash}\%\$\$
98
\%
\$\${\textbackslash}pi\$\$
π
-rotation fidelity. We then demonstrate its versatility by implementing a particular multi-axis control sequence, known as spin locking. Combined with electron-nuclear Hartmann–Hahn resonances which we also report in this work, this sequence will enable efficient coherent transfer of a quantum state from the electron spin to the mesoscopic nuclear ensemble.},
language = {en},
number = {1},
urldate = {2022-07-15},
journal = {npj Quantum Information},
author = {Bodey, J. H. and Stockill, R. and Denning, E. V. and Gangloff, D. A. and Éthier-Majcher, G. and Jackson, D. M. and Clarke, E. and Hugues, M. and Gall, C. Le and Atatüre, M.},
month = dec,
year = {2019},
pages = {95},
}
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