Extending the Quantum Coherence of a Near-Surface Qubit by Coherently Driving the Paramagnetic Surface Environment.

@article{Bluvstein2019ExtendingTQ,
  title={Extending the Quantum Coherence of a Near-Surface Qubit by Coherently Driving the Paramagnetic Surface Environment.},
  author={D. Bluvstein and Zhiran Zhang and Claire A McLellan and Nicolas R. Williams and Ania C. Bleszynski Jayich},
  journal={Physical review letters},
  year={2019},
  volume={123 14},
  pages={
          146804
        }
}
Surfaces enable useful functionalities for quantum systems, e.g., as interfaces to sensing targets, but often result in surface-induced decoherence where unpaired electron spins are common culprits. Here we show that the coherence time of a near-surface qubit is increased by coherent radio-frequency driving of surface electron spins, where we use a diamond nitrogen-vacancy (NV) center as a model qubit. This technique is complementary to other methods of suppressing decoherence and, importantly… 

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