Optimizing a dynamical decoupling protocol for solid-state electronic spin ensembles in diamond

@article{Farfurnik2015OptimizingAD,
  title={Optimizing a dynamical decoupling protocol for solid-state electronic spin ensembles in diamond},
  author={D. Farfurnik and Andrey Jarmola and Linh M. Pham and Zhihui Wang and Viatcheslav V. Dobrovitski and Ronald L. Walsworth and Dmitry Budker and Nir Bar-Gill},
  journal={Physical Review B},
  year={2015},
  volume={92},
  pages={060301}
}
In this study, we demonstrate significant improvements of the spin coherence time of a dense ensemble of nitrogen-vacancy (NV) centers in diamond through optimized dynamical decoupling (DD). Cooling the sample down to 77 K suppresses longitudinal spin relaxation T1 effects and DD microwave pulses are used to increase the transverse coherence time T2 from ~0.7ms up to ~30ms. Furthermore, we extend previous work of single-axis (Carr-Purcell-Meiboom-Gill) DD towards the preservation of arbitrary… 
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