Spin decoherence and electron spin bath noise of a nitrogen-vacancy center in diamond
Spin decoherence and electron spin bath noise of a nitrogen-vacancy center in diamond
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DOI：
10.1103/physrevb.87.115122
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发表时间：
2012-09
影响因子：
3.7
通讯作者：
Zhi-Hui Wang;Susumu Takahashi
中科院分区：
文献类型：
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作者：
Zhi-Hui Wang;Susumu Takahashi
我们从理论上研究了金刚石中单个氮空位（NV）中心的自旋退相干。使用自旋相干态P表示方法，模拟了氮电子自旋（N）包围的NV中心的相干演化。我们发现自旋退相干时间以及 NV 中心的自由感应衰减取决于 N 个自旋的空间配置。 NV中心的自旋退相干率(1/T2)和移相率(1/T2*)都随着N自旋的浓度线性增加。使用 P 表示方法，我们还演示了提取 N 旋转浴的噪声谱，这将为设计最佳脉冲序列以抑制金刚石退相干提供有希望的途径。
We theoretically investigate spin decoherence of a single nitrogen-vacancy (NV) center in diamond. Using the spin coherent state P-representation method, coherence evolution of the NV center surrounded by nitrogen electron spins (N) is simulated. We find that spin decoherence time as well as free-induction decay of the NV center depend on the spatial configuration of N spins. Both the spin decoherence rate (1/T2) and dephasing rate (1/T2*) of the NV center increase linearly with the concentration of the N spins. Using the P-representation method, we also demonstrate extracting noise spectrum of the N spin bath, which will provide promising pathways for designing an optimum pulse sequence to suppress the decoherence in diamond.