Using quantum technology to constrain new particles

Yet-to-be discovered axions and axion-like particles may be the key to explaining some of the deepest puzzles of our universe, such as dark matter and charge-parity violation in strong interactions. Several recent theories have predicted that the masses of axions probably lie within the well-motivated “axion window” (0.01 meV–1 meV). However, existing laboratory searches and astrophysical observation mostly search for the axions outside the axion window.