Dark states of single nitrogen-vacancy centers in diamond unraveled by single shot NMR

G. Waldherr, J. Beck, M. Steiner, P. Neumann, A. Gali, T. H. Frauenheim, F. Jelezko, J. Wrachtrup

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Abstract

The nitrogen-vacancy (NV) center in diamond is supposed to be a building block for quantum computing and nanometer-scale metrology at ambient conditions. Therefore, precise knowledge of its quantum states is crucial. Here, we experimentally show that under usual operating conditions the NV exists in an equilibrium of two charge states [70% in the expected negative (NV-) and 30% in the neutral one (NV0)]. Projective quantum nondemolition measurement of the nitrogen nuclear spin enables the detection even of the additional, optically inactive state. The nuclear spin can be coherently driven also in NV0 (T190ms and T26μs).

Original languageEnglish
Article number157601
JournalPhysical review letters
Volume106
Issue number15
DOIs
Publication statusPublished - ápr. 14 2011

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ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Waldherr, G., Beck, J., Steiner, M., Neumann, P., Gali, A., Frauenheim, T. H., Jelezko, F., & Wrachtrup, J. (2011). Dark states of single nitrogen-vacancy centers in diamond unraveled by single shot NMR. Physical review letters, 106(15), [157601]. https://doi.org/10.1103/PhysRevLett.106.157601