Modified Axion Electrodynamics as Impressed Electromagnetic Sources Through Oscillating Background Polarization and Magnetization

Understand

We present a reformulation of axion modified electrodynamics with all modifications redefined within the constitutive relations between the D,H,B and E fields.

• This allows the interpretation of the axion induced background bound charge, polarization current and background polarization and magnetization satisfying the charge-current continuity equation.
• This representation is of similar form to photon sector odd-parity Lorentz invariance violating background fields.
• We show that when a DC B-field is applied an oscillating background polarization is induced at a frequency equivalent to the axion mass.