Robust quantum-network memory based on spin qubits in isotopically engineered diamond

C. E. Bradley, S. W. de Bone, P. F. W. Möller, S. Baier, M. J. Degen, S. J. H. Loenen, H. P. Bartling, M. Markham, D. J. Twitchen, R. Hanson, D. Elkouss, and T. H. Taminiau1,2∗ QuTech, Delft University of Technology, 2628 CJ Delft, The Netherlands Kavli Institute of Nanoscience, Delft University of Technology, 2628 CJ Delft, The Netherlands QuSoft, Centrum Wiskunde & Informatica, 1098 XG, Amsterdam, The Netherlands and Element Six Innovation, Fermi Avenue, Harwell Oxford, Didcot, Oxfordshire, OX110QR, United Kingdom (Dated: November 19, 2021)