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  • Title: Strong coupling between a photon and a hole spin in silicon.
    Author: Yu CX, Zihlmann S, Abadillo-Uriel JC, Michal VP, Rambal N, Niebojewski H, Bedecarrats T, Vinet M, Dumur É, Filippone M, Bertrand B, De Franceschi S, Niquet YM, Maurand R.
    Journal: Nat Nanotechnol; 2023 Jul; 18(7):741-746. PubMed ID: 36879125.
    Abstract:
    Spins in semiconductor quantum dots constitute a promising platform for scalable quantum information processing. Coupling them strongly to the photonic modes of superconducting microwave resonators would enable fast non-demolition readout and long-range, on-chip connectivity, well beyond nearest-neighbour quantum interactions. Here we demonstrate strong coupling between a microwave photon in a superconducting resonator and a hole spin in a silicon-based double quantum dot issued from a foundry-compatible metal-oxide-semiconductor fabrication process. By leveraging the strong spin-orbit interaction intrinsically present in the valence band of silicon, we achieve a spin-photon coupling rate as high as 330 MHz, largely exceeding the combined spin-photon decoherence rate. This result, together with the recently demonstrated long coherence of hole spins in silicon, opens a new realistic pathway to the development of circuit quantum electrodynamics with spins in semiconductor quantum dots.
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