Speaker
Tong Li
(Nankai University)
Description
The Witten effect implies interaction between axion and magnetic monopole, and the quantum electromagnetodynamics (QEMD) properly describes electric charges, magnetic charges and photons. Based on the QEMD, a generic low-energy axion-photon effective field theory can be built. This generic axion-photon Lagrangian introduces the interactions between axion and two four-potentials, and leads to new axion-modified Maxwell equations. We properly solve the new axion-modified Maxwell equations and obtain the axion-induced electromagnetic fields given a static electric or magnetic field. I will also mention our proposals of new search strategies to measure the new axion couplings for sub-$\mu$eV axion in haloscope experiment.
