Aharonov-Bohm Radiation of Fermions

TL;DR

This paper studies the unique angular distribution and polarization features of fermionic radiation emitted from oscillating solenoids and cosmic strings, highlighting differences from bosonic radiation and implications for high-energy astrophysics.

Contribution

It provides the first detailed analysis of fermion emission patterns and polarization in Aharonov-Bohm radiation from solenoids and cosmic strings, revealing new physical insights.

Findings

Fermionic radiation is approximately isotropic at the lowest harmonic, unlike bosonic dipolar patterns.

Fermionic emission depends linearly on the ultraviolet cutoff, indicating strong high-energy emission.

Distinct polarization features of emitted fermion-antifermion pairs are identified.

Abstract

We analyze Aharonov-Bohm radiation of charged fermions from oscillating solenoids and cosmic strings. We find that the angular pattern of the radiation has features that differ significantly from that for bosons. For example, fermionic radiation in the lowest harmonic is approximately isotropically distributed around an oscillating solenoid, whereas for bosons the radiation is dipolar. We also investigate the spin polarization of the emitted fermion-antifermion pair. Fermionic radiation from kinks and cusps on cosmic strings is shown to depend linearly on the ultraviolet cut-off, suggesting strong emission at an energy scale comparable to the string energy scale.