Dark states of single nitrogen-vacancy centers in diamond unraveled by single shot NMR
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Updated: Jun 2, 2026

All-electronic Nanosecond-resolved Scanning Tunneling Microscopy: Facilitating the Investigation of Single Dopant Charge Dynamics
Published on: January 19, 2018
G Waldherr1, J Beck, M Steiner
13. Physikalisches Institut and Research Center SCOPE, University of Stuttgart, 70569 Stuttgart, Germany. g.waldherr@physik.uni-stuttgart.de
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 (T1≈90 ms and T2≈6 μs).
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