Axion quasiparticles for axion dark matter detection
Axion quasiparticles for axion dark matter detection
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DOI：
10.1088/1475-7516/2021/08/066
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发表时间：
2021-08-01
影响因子：
6.4
通讯作者：
Smejkal, Libor
中科院分区：
文献类型：
--
作者：
Schuette-Engel, Jan;Marsh, David J. E.;Smejkal, Libor
有人认为某些反铁磁拓扑绝缘体含有轴子准粒子（AQ），这种材料可以用来探测轴子暗物质（DM）。AQ是耦合到电磁Chern-Simons项的纵向反铁磁自旋涨落，其在施加磁场的存在下导致AQ和电场之间的质量混合。计算了电磁边界条件和透射反射系数。一个模型，包括到这个系统的损失，并计算所得的线宽。它示出了如何透射光谱可以用来测量材料的谐振频率和阻尼系数，并最终证明存在的AQ。色散关系和边界条件允许轴子DM在材料体积中共振转换成THz光子，该材料体积独立于共振频率，该共振频率可经由施加的磁场调谐。轴子DM检测的参数研究进行，计算升压幅度和带宽使用现实的材料性能，包括损失。该提案可以允许使用当前和不久的将来的技术在1至10 meV的质量范围内检测轴子DM。
It has been suggested that certain antiferromagnetic topological insulators contain axion quasiparticles (AQs), and that such materials could be used to detect axion dark matter (DM). The AQ is a longitudinal antiferromagnetic spin fluctuation coupled to the electromagnetic Chern-Simons term, which, in the presence of an applied magnetic field, leads to mass mixing between the AQ and the electric field. The electromagnetic boundary conditions and transmission and reflection coefficients are computed. A model for including losses into this system is presented, and the resulting linewidth is computed. It is shown how transmission spectroscopy can be used to measure the resonant frequencies and damping coefficients of the material, and demonstrate conclusively the existence of the AQ. The dispersion relation and boundary conditions permit resonant conversion of axion DM into THz photons in a material volume that is independent of the resonant frequency, which is tuneable via an applied magnetic field. A parameter study for axion DM detection is performed, computing boost amplitudes and bandwidths using realistic material properties including loss. The proposal could allow for detection of axion DM in the mass range between 1 and 10 meV using current and near future technology.