Radiative instability of quantum electrodynamics in chiral matter

Abstract

Modification of the photon dispersion relation in chiral matter enables $1\to 2$ scattering. As a result, the single fermion and photon states are unstable to photon radiation and pair production respectively. In particular, a fast fermion moving through chiral matter can spontaneously radiate a photon, while a photon can spontaneously radiate a fast fermion and anti-fermion pair. The corresponding spectra are derived in the ultra-relativistic approximation. It is shown that the polarization of the produced and decayed photons is determined by the sign of the chiral conductivity. Impact of a flat thin domain wall on the spectra is computed.

13 pages. v2: error in IVA corrected, explanations and references added, typos fixed

References in corpus (6)

• The Chiral Magnetic Effect
• Charge separation induced by P-odd bubbles in QCD matter
• Chiral Magnetic conductivity
• On electrodynamics of chiral matter
• Approach to Chandrasekhar-Kendall-Woltjer State in a Chiral Plasma
• Spontaneous topological transitions of electromagnetic fields in spatially inhomogeneous CP-odd domains

Cited by in corpus (12)

• Measuring chiral imbalance with collisional energy loss
• Transition radiation as a probe of chiral anomaly
• Damping rate of a fermion in ultradegenerate chiral matter
• Chiral Cherenkov and chiral transition radiation in anisotropic matter
• Electromagnetic Radiation in chiral matter: the Cherenkov case
• Collisional energy loss and the Chiral Magnetic Effect
• Photon radiation in hot nuclear matter by means of chiral anomalies
• Bremsstrahlung in chiral medium: anomalous magnetic contribution to the Bethe-Heitler formula
• Anomalous scattering and transport in chiral matter
• Magnetic Weyl semimetals as a source of circularly polarized THz radiation
• Chiral Cherenkov radiation in the presence of a time-dependent chiral chemical potential
• Optical manifestations of domains with constant topological charge density