Comment on arXiv:1901.10843 "Search for Axionlike Dark Matter with a Liquid-State Nuclear Spin Comagnetometer"

Search for axionlike dark matter with a liquid-state nuclear spin comagnetometer

We report the results of a search for axionlike dark matter using nuclear magnetic resonance (NMR) techniques. This search is part of the multi-faceted Cosmic Axion Spin Precession Experiment (CASPEr) program. In order to distinguish axionlike dark matter from magnetic fields, we employ a comagnetometry scheme measuring ultralow-field NMR signals involving two different nuclei ($^{13}$C and $^{1}$H) in a liquid-state sample of acetonitrile-2-$^{13}$C ($^{13}$CH$_{3}$CN). No axionlike dark matter signal was detected above background. This result constrains the parameter space describing the cou…

利用悬浮铁磁体进行超轻暗物质探测

Ultralight dark matter detection with levitated ferromagnets

本研究探讨了悬浮铁磁体对交流磁场的响应，并预测其对超轻暗物质（如类轴子和暗光子）的探测灵敏度，发现现有装置灵敏度可媲美传统实验，未来有望成为探测多种暗物质耦合的灵敏探针。