Decoherence of Near-Surface Nitrogen-Vacancy Centers Due to Electric Field Noise
Decoherence of Near-Surface Nitrogen-Vacancy Centers Due to Electric Field Noise
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DOI：
10.1103/physrevlett.115.087602
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发表时间：
2015-08-21
影响因子：
8.6
通讯作者：
Rugar, D.
中科院分区：
文献类型：
--
作者：
Kim, M.;Mamin, H. J.;Rugar, D.
我们表明，表面电荷波动产生的电场噪声可能是金刚石近表面氮空位（NV）中心自旋退相干的重要来源。这一结论是基于当金刚石表面被高介电常数液体（例如甘油）覆盖时观察到的自旋相干性的增加。双共振实验表明，即使在施加液体时与附近电子自旋的耦合没有改变，相干性也会得到改善。多脉冲自旋回波实验揭示了甘油对 NV 频率噪声频谱的影响。
We show that electric field noise from surface charge fluctuations can be a significant source of spin decoherence for near-surface nitrogen-vacancy (NV) centers in diamond. This conclusion is based on the increase in spin coherence observed when the diamond surface is covered with high-dielectric-constant liquids, such as glycerol. Double-resonance experiments show that improved coherence occurs even though the coupling to nearby electron spins is unchanged when the liquid is applied. Multipulse spin-echo experiments reveal the effect of glycerol on the spectrum of NV frequency noise.