  We investigate the emission of circularly polarized photons from a magnetized
quark-gluon plasma with nonzero quark-number and chiral charge chemical
potentials. These chemical potentials qualitatively influence the differential
emission rates of circularly polarized photons. A nonzero net electric charge
density, induced by quark-number chemical potentials, enhances the overall
emission of one circular polarization over the other, while a nonzero chiral
charge density introduces a spatial asymmetry in the emission with respect to
reflection in the transverse plane. The signs of the electrical and chiral
charge densities determine which circular polarization dominates overall and
whether the emission preferentially aligns with or opposes the magnetic field.
Based on these findings, we propose that polarized photon emission is a
promising observable for characterizing the quark-gluon plasma produced in
heavy-ion collisions.
