Unraveling quantum dephasing of nitrogen-vacancy center ensembles in diamond

IF 6.6 1区物理与天体物理 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

npj Quantum Materials Pub Date : 2026-03-12 DOI:10.1038/s41535-026-00869-5

Jixing Zhang, Cheuk Kit Cheung, Michael Kübler, Magnus Benke, Mathis Brossaud, Yihua Wang, Andrej Denisenko, Ruoming Peng, Jens Anders, Emilio Corcione, Cristina Tarín Sauer, Andrew M. Edmonds, Matthew Markham, Kazuo Nakamura, Hitoshi Sumiya, Shinobu Onoda, Junichi Isoya, Chen Zhang, Jörg Wrachtrup

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引用次数: 0

Abstract

Nitrogen-vacancy (NV) center ensembles in diamond are one of the most promising solid-state quantum platforms for various sensing applications. Achieving ultimate sensitivity requires simultaneously long spin dephasing times (\({T}_{2}^{* }\)) and high NV center concentrations. In this work, we propose a systematic measurement approach to quantify the electron spin dephasing in NV center ensembles and analyze the contributions of various sources to the dephasing time, including NV-NV interactions, strain and electric field distributions, 13C nuclear spins, and P1 electron spins. Our method is validated using a series of high-performance diamond samples, providing a comprehensive understanding of dephasing mechanisms and revealing correlations between NV concentration and different dephasing sources. Building on these insights, we outline strategies to further enhance the achievable sensitivity for DC magnetic field measurements.

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金刚石中氮空位中心系综的量子脱相

金刚石中的氮空位中心系综是各种传感应用中最有前途的固态量子平台之一。达到最终的灵敏度需要同时长自旋消相时间（\({T}_{2}^{* }\)）和高NV中心浓度。在这项工作中，我们提出了一种系统的测量方法来量化NV中心系综中的电子自旋失相，并分析了各种来源对失相时间的贡献，包括NV-NV相互作用、应变和电场分布、13C核自旋和P1电子自旋。我们的方法通过一系列高性能钻石样品进行验证，提供了对脱相机制的全面理解，并揭示了NV浓度与不同脱相源之间的相关性。在这些见解的基础上，我们概述了进一步提高直流磁场测量可实现灵敏度的策略。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

npj Quantum Materials Materials Science-Electronic, Optical and Magnetic Materials

CiteScore

10.60

自引率

3.50%

发文量

107

审稿时长

6 weeks

期刊介绍： npj Quantum Materials is an open access journal that publishes works that significantly advance the understanding of quantum materials, including their fundamental properties, fabrication and applications.