A new search for axion dark matter rules out past numerical predictions
(PHYSorg.com Physics)

The ADMX collaboration, a group of researchers working at universities across the U.S. and Europe, has recently performed a new search for invisible axion dark matter using a cavity haloscope and a low-noise Josephson parametric amplifier. Cavity haloscopes are sensitive instruments designed to detect and study halos around luminous bodies or other physical phenomena. Josephson parametric amplifiers, on the other hand, are technological tools that can be used to manipulate quantum states of microwave light fields.