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Abobeih MH, Cramer J, Bakker MA, et al. One-second coherence for a single electron spin coupled to a multi-qubit nuclear-spin environment. Nat Commun. 2018;9(1):2552doi: 10.1038/s41467-018-04916-z.
Abobeih, M. H., Cramer, J., Bakker, M. A., Kalb, N., Markham, M., Twitchen, D. J., & Taminiau, T. H. (2018). One-second coherence for a single electron spin coupled to a multi-qubit nuclear-spin environment. Nature communications, 9(1), 2552. https://doi.org/10.1038/s41467-018-04916-z
Abobeih, M H, et al. "One-second coherence for a single electron spin coupled to a multi-qubit nuclear-spin environment." Nature communications vol. 9,1 (2018): 2552. doi: https://doi.org/10.1038/s41467-018-04916-z
Abobeih MH, Cramer J, Bakker MA, Kalb N, Markham M, Twitchen DJ, Taminiau TH. One-second coherence for a single electron spin coupled to a multi-qubit nuclear-spin environment. Nat Commun. 2018 Jun 29;9(1):2552. doi: 10.1038/s41467-018-04916-z. PMID: 29959326; PMCID: PMC6026183.
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Nat Commun. 2018 Jun 29;9(1):2552. doi: 10.1038/s41467-018-04916-z.

One-second coherence for a single electron spin coupled to a multi-qubit nuclear-spin environment.

Nature communications

M H Abobeih, J Cramer, M A Bakker, N Kalb, M Markham, D J Twitchen, T H Taminiau

Affiliations

  1. QuTech, Delft University of Technology, PO Box 5046, 2600 GA, Delft, The Netherlands.
  2. Kavli Institute of Nanoscience Delft, Delft University of Technology, PO Box 5046, 2600 GA, Delft, The Netherlands.
  3. Element Six Innovation, Fermi Avenue, Harwell Oxford, Didcot, Oxfordshire, OX11 0QR, United Kingdom.
  4. QuTech, Delft University of Technology, PO Box 5046, 2600 GA, Delft, The Netherlands. [email protected].
  5. Kavli Institute of Nanoscience Delft, Delft University of Technology, PO Box 5046, 2600 GA, Delft, The Netherlands. [email protected].

PMID: 29959326 PMCID: PMC6026183 DOI: 10.1038/s41467-018-04916-z

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.

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