Transient phenomena in the axion assisted Schwinger effect
arXiv:2204.10842 · doi:10.1007/JHEP11(2022)033
Abstract
Particle production induced by a time-dependent background is well understood as the projection of the time-evolved initial state onto a set of final states. While the asymptotic initial and final states are well defined in the usual way, the definition of particles and antiparticles at intermediate times in the presence of external fields is ambiguous. These external fields moreover induce divergences which require regularization. In this paper we clarify some subtleties in the computation of transient effects in physical quantities for fermions in a homogeneous axion background, including Schwinger production in background electromagnetic fields. The presence of the axion requires particular care as well as knowledge of the UV theory when regulating the theory and computing the vacuum contribution to the fermion energy.
arXiv comment34 pages, 6 figures
References in corpus (23)
- Axions In String Theory
- Cosmological Relaxation of the Electroweak Scale
- Primordial magnetic fields from pseudo-Goldstone bosons
- Naturally inflating on steep potentials through electromagnetic dissipation
- N-flationary magnetic fields
- Schwinger Effect in 4D de Sitter Space and Constraints on Magnetogenesis in the Early Universe
- Gauge Field and Fermion Production during Axion Inflation
- Chiral Anomaly, Schwinger Effect, Euler-Heisenberg Lagrangian, and application to axion inflation
- Super-Adiabatic Particle Number in Schwinger and de Sitter Particle Production
- On the Time Dependence of Adiabatic Particle Number
- Fermionic Schwinger effect and induced current in de Sitter space
- Fermionic current and Schwinger effect in de Sitter spacetime
- Effect of a magnetic field on Schwinger mechanism in de Sitter spacetime
- Scalar current of created pairs by Schwinger mechanism in de Sitter spacetime
- Point splitting renormalization of Schwinger induced current in de Sitter spacetime
- Vacuum birefringence and the Schwinger effect in (3+1) de Sitter
- Physical renormalization condition for de Sitter QED
- Chiral Anomaly and Schwinger Effect in Non-Abelian Gauge Theories
- Effective treatment of U(1) gauge field and charged particles in axion inflation
- Axion assisted Schwinger effect
- Production and backreaction of massive fermions during axion inflation with non-Abelian gauge fields
- Semiclassical analysis of axion-assisted and axion-driven pair production
- Axion anomalies