Axion Dark Matter Detection using an LC Circuit

Abstract

It is shown that dark matter axions cause an oscillating electric current to flow along magnetic field lines. The oscillating current induced in a strong magnetic field ${\vec{B}}_0$ produces a small magnetic field ${\vec{B}}_a$. We propose to amplify and detect ${\vec{B}}_a$ using a cooled LC circuit and a very sensitive magnetometer. This appears to be a suitable approach to searching for axion dark matter in the $10^{-7}$ to $10^{-9}$ eV mass range.

Comments: 5 pages, 2 figures. The first version of our paper gave an incorrect discussion of thermal noise