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  • Open Access

Extending and measuring dephasing times of nuclear spins in NV centers of diamond

Jingfu Zhang1,2,*, Swathi S. Hegde1,†, Fedor Jelezko2,3, and Dieter Suter1

  • *Contact author: zhangjfu2000@yahoo.com.
  • †Present address: Qruise GmbH, Am Hoelzersbach 7, D-66113 Saarbruecken, Germany.

Phys. Rev. B 114, 144411 – Published 9 September, 2026

DOI: https://doi.org/10.1103/c1ng-bsnr

Abstract

Long coherence times rank among the most important performance measures for many different types of quantum technology. In the electron-nuclear spin system of NV centers of diamond, the nuclear spins provide particularly long dephasing times. However, since initialization and readout require assistance from the electron spin, the apparent dephasing times can be reduced by the electron spin lifetime. Here we propose and implement schemes for measuring and extending the dephasing times of nuclear spins, resulting in dephasing times that are longer than the longitudinal relaxation time T1 of the electron spin.

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