Inflationary magnetogenesis in Proca electrodynamics with Schwinger particle production
Abstract
We investigate inflationary magnetogenesis with massive vector fields, including charged scalar particle production via the Schwinger effect and its backreaction on the background electric energy density. Initially neglecting the Schwinger effect, we quantize the vector field and solve the equations of motion for transverse and longitudinal modes, computing the energy momentum tensor. We then incorporate the backreaction of the electric energy density and show that the longitudinal energy density is subleading compared to the electric background. Since the electric energy density dominates the magnetic contribution, we can treat the former separately from the perturbative contributions. We adopt this approach when studying particle production via the Schwinger effect, assuming that its backreaction acts only on the background electric energy density. The latter is computed using a classical background electromagnetic field minimally coupled to a quantum complex scalar field. The magnetic and longitudinal components are instead described through quantum fields. In this framework, the Schwinger production affects only the electric energy density, as long as it remains dominant compared to the other components. As a consistency check, we verify that for a null coupling constant we recover the same electric energy density as obtained within the fully quantum electromagnetic description. Finally, we show that for non-null coupling constants Schwinger particle production drastically reduces the electric energy density during the final stages of inflation.
Related
- Inflationary Magnetogenesis with f(R,ϕ) Coupling
- Strong-field electrodynamics at eleven parameters: the Schwinger field as the acceleration bound of the electron
- Finite-duration non-slow-roll effects in inflationary production of ultralight vector dark matter
- Sensing the Inflationary Production of Scalars
- Schwinger Pair Production in Superposed Electric-Field Pulses with Distinct Spatial Widths
BibTeX
@misc{dubbini2026inflationary,
title = {{Inflationary magnetogenesis in Proca electrodynamics with Schwinger particle production}},
author = {Mattia Dubbini and Orlando Luongo},
howpublished = {arXiv},
year = {2026},
month = oct,
doi = {10.48550/arxiv.2610.05406},
eprint = {2610.05406},
archivePrefix = {arXiv},
url = {https://arxiv.org/abs/2610.05406},
}
RIS
TY - UNPB
TI - Inflationary magnetogenesis in Proca electrodynamics with Schwinger particle production
AU - Mattia Dubbini
AU - Orlando Luongo
PY - 2026
DA - 2026/10/04
PB - arXiv
DO - 10.48550/arxiv.2610.05406
UR - https://arxiv.org/abs/2610.05406
AB - We investigate inflationary magnetogenesis with massive vector fields, including charged scalar particle production via the Schwinger effect and its backreaction on the background electric energy density. Initially neglecting the Schwinger effect, we quantize the vector field and solve the equations of motion for transverse and longitudinal modes, computing the energy momentum tensor. We then incorporate the backreaction of the electric energy density and show that the longitudinal energy density is subleading compared to the electric background. Since the electric energy density dominates the magnetic contribution, we can treat the former separately from the perturbative contributions. We adopt this approach when studying particle production via the Schwinger effect, assuming that its backreaction acts only on the background electric energy density. The latter is computed using a classical background electromagnetic field minimally coupled to a quantum complex scalar field. The magnetic and longitudinal components are instead described through quantum fields. In this framework, the Schwinger production affects only the electric energy density, as long as it remains dominant compared to the other components. As a consistency check, we verify that for a null coupling constant we recover the same electric energy density as obtained within the fully quantum electromagnetic description. Finally, we show that for non-null coupling constants Schwinger particle production drastically reduces the electric energy density during the final stages of inflation.
ER -