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Modular, hybrid quantum systems – where matter qubits are linked via photonic interconnects – hold vast potential across a wide gamut of domains, including quantum communication, quantum-enhanced metrology, and large-scale quantum computing. One universal resource underpins all these applications: the photon-mediated generation of Bell pairs between remote qubits. In this talk, I will describe an elementary two-node quantum network at the University of Oxford that has advanced the state of the art in remote entanglement performance, creating Bell pairs with up to 97% fidelity between ⁸⁸Sr⁺ ions held in separate vacuum chambers (at rates ~100 s⁻¹). Co-trapped ⁴³Ca⁺ ions provide a long-lived substrate for application circuits undisturbed by network activity (remote Bell state coherence time >10 s). This has recently enabled the first distributed quantum computation across optically linked quantum processors using deterministic quantum gate teleportation [1]. To illustrate the postselection-free execution of consecutive remote two-qubit gates, we benchmark distributed iSWAP- and SWAP-class circuits along with two-qubit instances of Grover’s search algorithm.

[1] D. Main et al., "Distributed quantum computing across an optical network link", Nature 638, 383–388 (2025)