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.

回旋化的确切检测是基础科学中的一个具有挑战性的问题，并且与应用有关。已经开发了基于经典角动量保护，量子标准和SAGNAC效应的多种方法。最近，由于自主技术系统的活动激增，对精度和紧凑（！）惯性导航的需求正在增加。在其他技术中，观察核自旋整体进动是一种精确测量旋转的有前途的方法。最先进的方法基于热原子碱金属蒸气中超极化核自旋的相锁进进液，但是很难整合。在这里，我们的目标是实现这种方法，并具有前景，以发展紧凑的精密陀螺仪。我们的方法基于钻石中的氮呈（NV）中心，在环境条件下显示出无与伦比的光学和自旋特性。我们将利用核自旋的合奏作为回旋的参考，可以将传感元素微型化，并使其与芯片技术兼容。考虑到钻石材料中核自旋的良好参数，估计的旋转传感器的理论极限是按每小时毫米的顺序，这使得该技术与基于纤维的环形光光陀螺仪相当，具有明显较小的尺寸的优势。与微电动机电（MEMS）技术相比，核自旋陀螺仪将显示出更好的偏置稳定性特征。在项目过程中，将对核旋转合奏的使用进行优化。该项目将包括开发用于旋转传感的新型控制方案及其基本精确限制的研究。该项目的后半部分致力于通过利用新颖的控制方法和量子控制技术（例如误差校正和相干反馈）来最大程度地减少和补偿可能的最佳传感协议中的漂移和系统效应。该项目将在两个实验室的合作中进行：德国方面的Wrachtrup教授和俄罗斯一方的Akimov教授。德国方面在制定传感协议和推进钻石材料方面具有广泛而长期的记录，而俄罗斯方面已经进行了有关原理证明陀螺仪测量的研究工作。通过加入，这种合作有可能通过探索新颖的钻石材料和传感协议来与NV中心进行旋转感测。