Study of fundamental limits of solid-state nuclear spin gyroscopy based on NV centers in diamond

基于金刚石NV中心的固态核自旋陀螺基本极限研究

• 批准号: 445397527
• 负责人: Professor Dr. Jörg Wrachtrup
• 金额: --
• 依托单位: Department of Chemistry
• 依托单位国家: 德国
• 项目类别: Research Grants
• 资助国家: 德国
• 项目状态: 未结题
• 来源: https://gepris.dfg.de/gepris/projekt/445397527?language=en
• 关键词: Study; fundamental; limits; solid; state

The precise detection of gyration is a challenging problem in basic science and of significant relevance for applications. A variety of methods based on classical angular momentum conservation, quantum standards as well as the Sagnac effect have been developed. Recently the demand for precision and compact (!) inertial navigation is increasing, caused by the surge of activities on autonomous technical systems. Among other technologies the observation of a nuclear spin ensemble precession is a promising method to measure rotation precisely. State of the art methods are based on phase-locked precession of ensembles of hyperpolarized nuclear spins in hot atomic alkali metal vapours, which however is hard to integrate. Here, we aim to realize such a method in a solid with the prospect to develop compact precision gyroscopes. Our approach is based on nitrogen-vacancy (NV) centers in diamond, shown to have unparalleled optical and spin properties under ambient conditions. We will utilize an ensemble of nuclear spins as reference for gyration which allows miniaturizing the sensing element and make it compatible with chip technology. Taking into account well-studied parameters of nuclear spins in the diamond material, the estimated theoretical limit of rotation sensor is on the order of millidegree per hour which puts this technology on par with fiber-based ring-laser optical gyroscopes with the advantage of a significantly smaller size. In comparison to the micro electromechanical (MEMS) technology, the nuclear spin gyroscope will show significantly better bias stability characteristics. In the course of the project, the diamond material will be optimized towards the usage of nuclear spin ensembles. The project will include research on developing novel control protocols for rotational sensing, and its fundamental precision limits. The latter part of the project is devoted to studies of minimizing and compensating the drifts and systematic effects in a possible optimal sensing protocol through utilizing novel control methods and quantum control techniques such as error correction and coherent feedback. The project will be pursued in a collaboration of two laboratories: Prof. Wrachtrup from the German side and Prof. Akimov from Russian side. The German side has a broad and longstanding track record in developing sensing protocols and advancing diamond materials, while the Russian side already has ongoing research work on proof of principles gyroscopic measurements with NV in diamond. By joining forces, this collaboration has the potential to enable rotational sensing with NV centers by exploring novel diamond materials and sensing protocols.

回转运动的精确检测是基础科学中的一个具有挑战性的问题，具有重要的应用意义。基于经典角动量守恒、量子标准以及Sagnac效应的各种方法已经发展起来。最近，对精度和紧凑性的需求(！)由于自主技术系统上的活动激增，惯性导航正在增加。在其他技术中，观测核自旋系综进动是一种很有前途的精确测量自转的方法。最先进的方法是基于超极化核自旋系综在热原子碱金属蒸气中的锁相进动，但这很难积分。在这里，我们的目标是在固体中实现这种方法，并有可能开发出紧凑型精密陀螺仪。我们的方法是基于钻石中的氮空位(NV)中心，在环境条件下显示出无与伦比的光学和自旋性质。我们将利用一组核自旋作为回转的参考，这使得传感元件可以微型化，并使其与芯片技术兼容。考虑到钻石材料中的核自旋参数，旋转传感器的估计理论极限约为每小时毫度，这使这项技术与基于光纤的环形激光光学陀螺仪不相上下，其优势是体积小得多。与微电子机械(MEMS)技术相比，核自旋陀螺将表现出明显更好的偏置稳定性特性。在该项目的过程中，钻石材料将针对核自旋系综的使用进行优化。该项目将包括为旋转传感开发新的控制协议及其基本精度限制的研究。该项目的后半部分致力于通过利用新的控制方法和量子控制技术(如纠错和相干反馈)来最小化和补偿可能的最佳感知协议中的漂移和系统影响。该项目将与两个实验室合作进行：德国的Wrachtrup教授和俄罗斯的Akimov教授。德方在制定传感协议和改进钻石材料方面有着广泛和长期的记录，而俄方已经在与钻石中的NV进行陀螺仪测量的原则证明方面的研究工作正在进行中。通过联合起来，这种合作有可能通过探索新的钻石材料和传感协议，实现与NV中心的旋转传感。