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Protecting quantum spin coherence of nanodiamonds in living cells

Date:December 6, 2017 Views:

Due to its superior coherent and optical properties at room temperature, the nitrogen-vacancy (NV) center in diamond has become a promising quantum probe for nanoscale quantum sensing. However, the application of NV containing nanodiamonds to quantum sensing in biology and nanomedicine is hindered by their relatively poor spin coherence. The traditional strategy to protect spin coherence using pulsed dynamical decoupling is limited by the microwave power and thus may not be efficient for protecting quantum spin coherence when nanodiamonds are located in living cells. Here we demonstrate efficient protection of spin coherence of NVs in nanodiamonds using concatenated continuous dynamical decoupling. We observe significantly extended spin coherence time under the constraint of microwave power. We apply the decoupling strategy to nanodiamonds in living cells, and extend the spin coherence time by an order of magnitude up to 30 microseconds. Our result may provide an important step towards efficient in vivo quantum sensing using NV centers in nanodiamond.

Reference:     Protecting quantum spin coherence of nanodiamonds in living cells   , Q.-Y. Cao,  Z.-J. Shu,  P.-C. Yang,  M. Yu,  M.-S. Gong,  A. Retzker,  M. B. Plenio,  C. Müller,  N. Tomek,  B. Naydenov,  L. P. McGuinness,  F. Jelezko,  J.-M. Cai, arXiv: 1710.10744.


Recent Preprints