论文标题
用量子限制的铁磁卤素搜索斧头搜索
Axion search with a quantum-limited ferromagnetic haloscope
论文作者
论文摘要
铁磁轴卤素器通过利用其与电子自旋的相互作用来以轴的形式搜索暗物质。它由与敏感RF检测器耦合的轴向到电磁场传感器组成。前者是一个光子杂种杂种系统，后者基于量子限制的约瑟夫森参数放大器。混合系统由十2.1毫米直径的YIG球组成，该球通过静态磁场耦合到单个微波腔模式。我们的设置是有史以来最敏感的RF旋转磁铁表。最小可检测的字段为$ 5.5 \ times10^{ - 19} \，$ t具有9小时的集成时间，对应于轴 - 电子耦合常数$ g_ {aee} \ le1.7 \ le1.7 \ times10^{ - 11} $ 95％Cl的限制。我们的Haloscope的科学运行在大约120 MHz的频率范围内对DM轴对电子耦合常数的最佳限制，对应于Axion质量范围$ 42.4 $ - $ 43.1 \，μ$ EV。这也是第一个通过更改静态磁场进行轴突质量扫描的设备。
A ferromagnetic axion haloscope searches for Dark Matter in the form of axions by exploiting their interaction with electronic spins. It is composed of an axion-to-electromagnetic field transducer coupled to a sensitive rf detector. The former is a photon-magnon hybrid system, and the latter is based on a quantum-limited Josephson parametric amplifier. The hybrid system consists of ten 2.1 mm diameter YIG spheres coupled to a single microwave cavity mode by means of a static magnetic field. Our setup is the most sensitive rf spin-magnetometer ever realized. The minimum detectable field is $5.5\times10^{-19}\,$T with 9 h integration time, corresponding to a limit on the axion-electron coupling constant $g_{aee}\le1.7\times10^{-11}$ at 95% CL. The scientific run of our haloscope resulted in the best limit on DM-axions to electron coupling constant in a frequency span of about 120 MHz, corresponding to the axion mass range $42.4$-$43.1\,μ$eV. This is also the first apparatus to perform an axion mass scanning by changing the static magnetic field.
