Worldline instantons for nonperturbative particle production by space and time dependent gravitational fields
High Energy Physics - Theory
2025-08-05 v1 General Relativity and Quantum Cosmology
Abstract
We develop a worldline-instanton approach for calculating the momentum spectrum of particles produced by gravitational fields which depend on both space and time. The instantons are open. The middle part is complex and describes the formation region, while the ends describe the trajectories of asymptotic particles.
Keywords
Cite
@article{arxiv.2508.01901,
title = {Worldline instantons for nonperturbative particle production by space and time dependent gravitational fields},
author = {Philip Semrén and Greger Torgrimsson},
journal= {arXiv preprint arXiv:2508.01901},
year = {2025}
}
Comments
21 pages, 20 figures