Scalable surface ion trap design for magnetic quantum sensing and gradiometry

Q2 Physics and Astronomy

Physics Open Pub Date : 2024-02-22 DOI:10.1016/j.physo.2024.100208

Qirat Iqbal, Altaf Hussain Nizamani

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Abstract

Magnetic quantum sensors based on trapped ions utilize properties of quantum mechanics which have optimized precision and beat current limits in sensor technology. Trapped ions are highly sensitive in a large span of signal ranging from DC or static B-field to the radiofrequency range in 100s of MHz and can attain the sensitivity in the range of $pT / \sqrt{Hz}$ to sub- $pT / \sqrt{Hz}$ . They are tuneable to frequencies of interest and can be used as a lock-in frequency detector. This modelling and simulation based study presents an innovative design of Surface Paul Traps, enabling the use of trapped ions as ultra-sensitive sensors for magnetic field detection and precise measurement of magnetic field gradients at a sub-millimeter spatial resolution. The novel design features multiple trapping regions, allowing for the mapping of magnetic fields across various ion-trapping zones. The study demonstrates groundbreaking advancements in ion manipulation and confinement through innovative chip architecture.

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用于磁量子传感和梯度测量的可扩展表面离子阱设计

基于捕获离子的磁量子传感器利用量子力学的特性，优化了精度，打破了目前传感器技术的极限。捕获离子对从直流或静态 B 场到 100 兆赫射频范围内的各种信号都具有高灵敏度，灵敏度可达 pT/Hz 至 sub-pT/Hz。它们可调整到感兴趣的频率，并可用作锁定频率检测器。这项基于建模和模拟的研究介绍了表面保罗陷阱的创新设计，使被捕获的离子能够作为超灵敏传感器用于磁场检测，并以亚毫米级的空间分辨率精确测量磁场梯度。这种新颖的设计具有多个捕集区，可以绘制不同离子捕集区的磁场图。这项研究展示了通过创新芯片架构在离子操纵和限制方面取得的突破性进展。

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