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Coherence of nitrogen-vacancy electronic spin ensembles in diamond

P. L. Stanwix, L. M. Pham, J. R. Maze, D. Le Sage, T. K. Yeung, P. Cappellaro, P. R. Hemmer, A. Yacoby, M. D. Lukin, and R. L. Walsworth
Phys. Rev. B 82, 201201(R) – Published 17 November 2010

Abstract

We present an experimental and theoretical study of electronic spin decoherence in ensembles of nitrogen-vacancy (NV) color centers in bulk high-purity diamond at room temperature. Under appropriate conditions, we find ensemble NV spin coherence times (T2) comparable to that of single NV with T2>600μs for a sample with natural abundance of C13 and paramagnetic impurity density 1015cm3. We also observe a sharp decrease in the coherence time with misalignment of the static magnetic field relative to the NV electronic spin axis, consistent with theoretical modeling of NV coupling to a C13 nuclear-spin bath. The long coherence times and increased signal-to-noise provided by room-temperature NV ensembles will aid many applications of NV centers in precision magnetometry and quantum information.

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  • Received 13 October 2010

DOI:https://doi.org/10.1103/PhysRevB.82.201201

©2010 American Physical Society

Authors & Affiliations

P. L. Stanwix1,2, L. M. Pham3, J. R. Maze4,5, D. Le Sage1, T. K. Yeung3, P. Cappellaro6, P. R. Hemmer7, A. Yacoby4, M. D. Lukin4, and R. L. Walsworth1,4,*

  • 1Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA
  • 2School of Physics, University of Western Australia, Crawley, Western Australia 6009, Australia
  • 3School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA
  • 4Physics Department, Harvard University, Cambridge, Massachusetts 02138, USA
  • 5Facultad de Física, Pontificia Universidad Católica de Chile, Casilla 306, Santiago, Chile
  • 6Department of Nuclear Science and Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
  • 7Department of Electrical and Computer Engineering, Texas A&M University, College Station, Texas 77843, USA

  • *rwalsworth@cfa.harvard.edu

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Vol. 82, Iss. 20 — 15 November 2010

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