Optical spin locking of a solid-state qubit
| Autor: | Bodey, J. H., Stockill, R., Denning, E. V., Gangloff, D. A., Ethier-Majcher, G., Jackson, D. M., Clarke, E., Hugues, M., Gall, C. Le, Atature, M. |
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| Rok vydání: | 2019 |
| Předmět: | |
| Zdroj: | Quantum Inf 5, 95 (2019) |
| Druh dokumentu: | Working Paper |
| DOI: | 10.1038/s41534-019-0206-3 |
| Popis: | 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% pi-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. Comment: 11 pages, 10 figures |
| Databáze: | arXiv |
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