Verifiable blind quantum computing with trapped ions and single photons

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We report the first hybrid matter-photon implementation of verifiable blind quantum computing.

• We use a trapped-ion quantum server and a client-side photonic detection system networked via a fibre-optic quantum link.
• The availability of memory qubits and deterministic entangling gates enables interactive protocols without post-selection - key requirements for any scalable blind server, which previous realisations could not provide.
• We quantify the privacy at <~0.03 leaked classical bits per qubit.