Effective Approximation of Electromagnetism for Axion Haloscope Searches

Understand

We applied an effective approximation into Maxwell's equations with an axion interaction for haloscope searches.

• A set of Maxwell's equations acquired from this approximation describes just the reacted fields generated by the anomalous interaction.
• Unlike other approaches, this set of Maxwell's equations inherently satisfies the boundary conditions for haloscope searches.
• The electromagnetic field solutions from the Maxwell's equations were evaluated for both cylindrical and toroidal cavity geometries including when the axion mass becomes ultra-light (sub-meV).