Ultra-sensitive Diamond Magnetometry Using Optimal Dynamic Decoupling

Details Ultra-sensitive Diamond Magnetometry Using Optimal Dynamic Decoupling Ultra-sensitive Diamond Magnetometry Using Optimal Dynamic Decoupling

2010-03-19

arxiv.org/abs/1003.3699v1

Physics

Quantum Physics

4 pages, 3 figures

Scientific paper

New magnetometry techniques based on Nitrogen Vacancy (NV) defects in diamond have received much attention of late as a means to probe nanoscale magnetic environments. The sensitivity of a single NV magnetometer is primarily determined by the transverse spin relaxation time, $T_2$. Current approaches to improving the sensitivity employ crystals with a high NV density at the cost of spatial resolution, or extend $T_2$ via the manufacture of novel isotopically pure diamond crystals. We adopt a complementary approach, in which optimal dynamic decoupling techniques extend coherence times out to the self-correlation time of the spin bath. This suggests single spin, room temperature magnetometer sensitivities as low as 5\,pT\,Hz$^{-1/2}$ with current technology.

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