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Ultrasensitive diamond magnetometry using optimal dynamic decoupling

机译:使用最佳动态去耦的超灵敏金刚石磁力分析

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摘要

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) may be possible with current technology.
机译:最近,作为探测纳米级磁性环境的一种手段,基于金刚石中氮空位(NV)缺陷的磁力计技术受到了广泛关注。单个NV磁力计的灵敏度主要由横向自旋松弛时间T_2决定。当前提高灵敏度的方法以空间分辨率为代价采用具有高NV密度的晶体,或者通过制造新型同位素纯金刚石晶体来扩展T_2。我们采用一种补充方法,其中最佳动态去耦技术将相干时间扩展到旋转浴的自相关时间。这表明,利用当前技术,单旋转的室温磁力计灵敏度可能低至5 pT Hz〜(-1/2)。

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