系统间交叉速率和光学光照对靠近氮空位中心的核自旋极化的影响

H. Duarte, H. T. Dinani, V. Jacques, J. Maze
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引用次数: 2

摘要

在量子计量和量子信息应用中,对氮空位中心附近的核环境进行了极化研究。不同的方法显示出不同的核自旋极化效率,并且依赖于与NV中心相关的电子自旋极化,而电子自旋极化又关键地依赖于系统间交叉。最近,对系统间交叉的速率进行了测量,得出了不同的过渡速率模型。本文考虑了电子自旋处于ms = 0和ms = 1状态时,这些速率对基于能级反交叉和核居群进动的几种核极化方法的影响。我们证明了核极化取决于用于使电子自旋极化的光激发的功率。每种跃迁速率模型的核自旋极化程度不同。因此,这里提出的结果是相关的验证这些模型和极化核自旋。此外,我们通过考虑相对于NV中心对称轴的核位置来分析每种方法的性能。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effect of intersystem crossing rates and optical illumination on the polarization of nuclear spins close to nitrogen-vacancy centers
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.
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