Publikation: A coherent spin-photon interface in silicon
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Electron spins in silicon quantum dots are attractive systems for quantum computing owing to their long coherence times and the promise of rapid scaling of the number of dots in a system using semiconductor fabrication techniques. Although nearest-neighbour exchange coupling of two spins has been demonstrated, the interaction of spins via microwave-frequency photons could enable long-distance spin-spin coupling and connections between arbitrary pairs of qubits ('all-to-all' connectivity) in a spin-based quantum processor. Realizing coherent spin-photon coupling is challenging because of the small magnetic-dipole moment of a single spin, which limits magnetic-dipole coupling rates to less than 1 kilohertz. Here we demonstrate strong coupling between a single spin in silicon and a single microwave-frequency photon, with spin-photon coupling rates of more than 10 megahertz. The mechanism that enables the coherent spin-photon interactions is based on spin-charge hybridization in the presence of a magnetic-field gradient. In addition to spin-photon coupling, we demonstrate coherent control and dispersive readout of a single spin. These results open up a direct path to entangling single spins using microwave-frequency photons.
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MI, Xiao, Mónica BENITO, Stefan PUTZ, David M. ZAJAC, Jacob M. TAYLOR, Guido BURKARD, Jason R. PETTA, 2018. A coherent spin-photon interface in silicon. In: Nature. 2018, 555(7698), pp. 599-603. ISSN 0028-0836. eISSN 1476-4687. Available under: doi: 10.1038/nature25769BibTex
@article{Mi2018-02-14coher-41585,
year={2018},
doi={10.1038/nature25769},
title={A coherent spin-photon interface in silicon},
number={7698},
volume={555},
issn={0028-0836},
journal={Nature},
pages={599--603},
author={Mi, Xiao and Benito, Mónica and Putz, Stefan and Zajac, David M. and Taylor, Jacob M. and Burkard, Guido and Petta, Jason R.}
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