面向稀有气体量子光学磁力测量的直接紫外探测方法
Towards noble gas quantum optical magnetometry using direct ultraviolet detection
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中文总结 AI 辅助
本文提出用紫外频率梳激光直接探测稀有气体核自旋进动，无需碱金属混合，通过优化激光功率、噪声和光束尺寸，实现室温下24 aT/√Hz的创纪录磁力测量灵敏度。
中文摘要 AI 辅助
我们分析了一种通过光学检测稀有气体中核自旋进动来实现量子磁传感的新方法。该检测使用紫外频率梳激光器进行，因此在传感阶段无需将碱金属蒸气与稀有气体混合，从而允许在室温下实现长达数小时的自旋弛豫时间。我们的分析表明，结合高激光功率和低激光强度噪声对于达到并超越最先进的磁力测量性能（包括低温磁力计的性能）至关重要。我们找到了基本噪声或技术噪声分别主导的运行区域，这分别引导实验工作侧重于增加激光功率或降低激光强度噪声。我们还表明，优化光束尺寸是实现最佳灵敏度的关键。我们的计算预测，使用相对强度噪声为-100 dBc/Hz的10 W紫外激光器，在10分钟内可实现创纪录的24 aT/√Hz灵敏度。
英文摘要
We analyze a novel approach for quantum magnetic sensing via optical detection of nuclear spin precession in a noble gas. The detection is carried out with an ultraviolet frequency comb laser, so no alkali vapor is required to be mixed with the noble gas during the sensing stage, allowing for hours-long spin relaxation time at room temperature. Our analysis reveals that combining high laser power and low laser intensity noise is crucial to achieving and exceeding state-of-the-art magnetometric performance, including that of cryogenic magnetometers. We find operational regimes where either fundamental or technical noise dominate, which directs experimental effort towards increasing laser power or lowering laser intensity noise, respectively. We also show that optimizing beam size is key to achieving optimal sensitivity. Our calculations predict that a record-breaking sensitivity of $24~\mathrm{aT}/\sqrt{\mathrm{Hz}}$ is achievable in 10 minutes with a 10 W ultraviolet laser with a relative intensity noise of -100 dBc/Hz.
发表机构
- University of Alberta（阿尔伯塔大学）
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