Print Email Facebook Twitter Robust quantum-network memory based on spin qubits in isotopically engineered diamond Title Robust quantum-network memory based on spin qubits in isotopically engineered diamond Author Bradley, C.E. (TU Delft QuTech Advanced Research Centre; TU Delft QID/Taminiau Lab; Kavli institute of nanoscience Delft) de Bone, S.W. (TU Delft QID/Elkouss Group; TU Delft QuTech Advanced Research Centre; QuSoft) Möller, P. F.W. (Student TU Delft) Baier, S. (TU Delft QuTech Advanced Research Centre; TU Delft QID/Hanson Lab; Kavli institute of nanoscience Delft) Degen, M.J. (TU Delft QID/Hanson Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Loenen, S.J.H. (TU Delft QuTech Advanced Research Centre; TU Delft QID/Taminiau Lab; Kavli institute of nanoscience Delft) Bartling, H.P. (TU Delft QID/Taminiau Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Hanson, R. (TU Delft QuTech Advanced Research Centre; TU Delft QID/Hanson Lab; TU Delft QN/Hanson Lab; Kavli institute of nanoscience Delft) Elkouss Coronas, D. (TU Delft QuTech Advanced Research Centre; TU Delft Quantum Information and Software) Taminiau, T.H. (TU Delft QuTech Advanced Research Centre; TU Delft QID/Taminiau Lab; Kavli institute of nanoscience Delft) Date 2022 Abstract Quantum networks can enable quantum communication and modular quantum computation. A powerful approach is to use multi-qubit nodes that provide quantum memory and computational power. Nuclear spins associated with defects in diamond are promising qubits for this role. However, dephasing during optical entanglement distribution hinders scaling to larger systems. Here, we show that a 13C-spin quantum memory in isotopically engineered diamond is robust to the optical link operation of a nitrogen-vacancy centre. The memory lifetime is improved by two orders-of-magnitude upon the state-of-the-art, surpassing reported times for entanglement distribution. Additionally, we demonstrate that the nuclear-spin state can survive ionisation and recapture of the nitrogen-vacancy electron. Finally, we use simulations to show that combining this memory with previously demonstrated entanglement links and gates can enable key network primitives, such as deterministic non-local two-qubit gates, paving the way for test-bed quantum networks capable of investigating complex algorithms and error correction. To reference this document use: http://resolver.tudelft.nl/uuid:e8fe0b04-4d91-4d73-b0f1-80f6300c2edf DOI https://doi.org/10.1038/s41534-022-00637-w ISSN 2056-6387 Source NPJ Quantum Information, 8 (1) Part of collection Institutional Repository Document type journal article Rights © 2022 C.E. Bradley, S.W. de Bone, P. F.W. Möller, S. Baier, M.J. Degen, S.J.H. Loenen, H.P. Bartling, R. Hanson, D. Elkouss Coronas, T.H. Taminiau, More Authors Files PDF s41534_022_00637_w_1.pdf 1.49 MB Close viewer /islandora/object/uuid:e8fe0b04-4d91-4d73-b0f1-80f6300c2edf/datastream/OBJ/view