Abstract
We propose a new window to detect axion-like particle (ALP) dark matter from electrically charged fermions, such as electrons and quarks. We specifically consider a direct interaction between the axion and the electron and find that the non-relativistic quantum dynamics induces a spin precession due to the axion and is enhanced by the application of an external electric field. This precession gives a change in magnetic flux which under certain circumstances can yield a detectable signal for SQUID magnetometers.
Highlights
One of the most compelling dark matter candidates is the invisible axion, which solves the strong CP problem in QCD [1,2]
It is well known that the axion modifies the Maxwell equations by having a new interaction δL ∝ φE · B [1,2,8]
Others have exploited the possibility of detecting the change in flux from a carefully oriented external magnetic field [12,13]
Summary
One of the most compelling dark matter candidates is the invisible axion, which solves the strong CP problem in QCD [1,2]. Have been considered [18,19] and find similar forms for an induced electron electric dipole moment. We consider new interactions and the quantum mechanics of electrons in the presence of axion dark matter and an external electric field.
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