论文标题
系统间越过速率和光照明对附近核自旋极化的影响
Effect of inter-system crossing rates and optical illumination on the polarization of nuclear spins nearby nitrogen-vacancy centers
论文作者
论文摘要
为了使附近的氮空位（NV）中心的核环境极化，以使量子计量和量子信息应用两极分化。不同的方法显示出不同的核自旋极化效率，并依赖于与NV中心相关的电子自旋极化，这反过来依赖于系统间交叉。最近，已经测量了系统间穿越中涉及的速率，从而导致不同的过渡速率模型。在这里，我们考虑了这些速率对基于水平的抗横断的几种核极化方法的影响，而电子自旋在MS = 0和MS = 1旋转状态时的核种群的影响。我们表明核极化取决于用于偏振电子自旋的光激励的能力。对于每个过渡速率模型，核自旋极化程度都不同。因此，此处介绍的结果与验证这些模型和偏振核自旋有关。此外，我们通过考虑相对于NV中心的对称轴的核位置来分析每种方法的性能。
Several efforts have been made to polarize the nearby nuclear environment of nitrogen vacancy (NV) centers for quantum metrology and quantum information applications. Different methods showed different nuclear spin polarization efficiencies and rely on electronic spin polarization associated to the NV center, which in turn crucially depends on the inter-system crossing. Recently, the rates involved in the inter-system crossing have been measured leading to different transition rate models. Here, we consider the effect of these rates on several nuclear polarization methods based on the level anti-crossing, and precession of the nuclear population while the electronic spin is in the ms = 0 and ms = 1 spin states. We show that the nuclear polarization depends on the power of optical excitation used to polarize the electronic spin. The degree of nuclear spin polarization is different for each transition rate model. Therefore, the results presented here are relevant for validating these models and for polarizing nuclear spins. Furthermore, we analyze the performance of each method by considering the nuclear position relative to the symmetry axis of the NV center.
