Print Email Facebook Twitter One-second coherence for a single electron spin coupled to a multi-qubit nuclear-spin environment Title One-second coherence for a single electron spin coupled to a multi-qubit nuclear-spin environment Author Abobeih, M.H.M.A. (TU Delft QID/Taminiau Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Cramer, J. (TU Delft ALG/General; TU Delft QID/Hanson Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Bakker, M.V. (TU Delft Aerospace Engineering; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Kalb, N. (TU Delft QID/Hanson Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Markham, M. (Element Six Innovation) Twitchen, D. J. (Element Six Innovation) Taminiau, T.H. (TU Delft QID/Taminiau Lab; TU Delft QuTech Advanced Research Centre; Kavli institute of nanoscience Delft) Faculty Aerospace Engineering Date 2018-12-01 Abstract Single electron spins coupled to multiple nuclear spins provide promising multi-qubit registers for quantum sensing and quantum networks. The obtainable level of control is determined by how well the electron spin can be selectively coupled to, and decoupled from, the surrounding nuclear spins. Here we realize a coherence time exceeding a second for a single nitrogen-vacancy electron spin through decoupling sequences tailored to its microscopic nuclear-spin environment. First, we use the electron spin to probe the environment, which is accurately described by seven individual and six pairs of coupled carbon-13 spins. We develop initialization, control and readout of the carbon-13 pairs in order to directly reveal their atomic structure. We then exploit this knowledge to store quantum states in the electron spin for over a second by carefully avoiding unwanted interactions. These results provide a proof-of-principle for quantum sensing of complex multi-spin systems and an opportunity for multi-qubit quantum registers with long coherence times. To reference this document use: http://resolver.tudelft.nl/uuid:0fab3987-60fa-4737-8e85-b955f5f02d0c DOI https://doi.org/10.1038/s41467-018-04916-z ISSN 2041-1723 Source Nature Communications, 9 (1) Part of collection Institutional Repository Document type journal article Rights © 2018 M.H.M.A. Abobeih, J. Cramer, M.V. Bakker, N. Kalb, M. Markham, D. J. Twitchen, T.H. Taminiau Files PDF s41467_018_04916_z.pdf 2.09 MB Close viewer /islandora/object/uuid:0fab3987-60fa-4737-8e85-b955f5f02d0c/datastream/OBJ/view