AI 中文总结
本研究提出新型非对称自旋波干涉仪探测超轻轴子暗物质，通过轴子调制自旋波特性实现信号转换，评估三种探测方案信噪比，可探测轴子质量范围约$10^{-8}$ eV至$10^{-6}$ eV。
AI 中文摘要
我们提出一种新型非对称自旋波干涉仪以探测超轻轴子暗物质。轴子通过铁磁体中的弱有效磁场调制自旋波特性，该干涉仪将自旋波源拆分为两条长度不同的路径并使其发生相消干涉，随后系统将轴子诱导的相移转换为可测量的磁化振荡，该振荡可辐射电磁波并通过法拉第感应产生电信号。我们针对线性放大器、单光子探测器和电信号探测这三种探测方案评估了信噪比，同时考虑了磁化涨落和热噪声，由自旋波传播长度和弛豫时间确定的可探测轴子质量范围约为$10^{-8}$ eV至$10^{-6}$ eV。
英文摘要
We propose a novel asymmetric spin wave interferometer to detect ultralight axion dark matter. The axion modulates spin-wave properties via a weak effective magnetic field in ferromagnets. The interferometer splits a spin-wave source into two paths of different lengths and sets them to interfere destructively. The system then converts the axion-induced phase shift into a measurable magnetization oscillation that can radiate electromagnetic waves and generate electrical signals via Faraday induction. The signal-to-noise ratios have been evaluated for three detection schemes: the linear amplifier, the single-photon detector, and the electrical signal detection approach, accounting for both magnetization fluctuation and thermal noise. The accessible axion mass range is approximately $10^{-8}$ eV to $10^{-6}$ eV, set by the spin wave propagation length and the relaxation time.
Comments11 pages, 2 figures
