In-Out Formalism for One-Loop Effective Actions in QED and Gravity
Abstract
The in-out formalism is a systematic and powerful method for finding the effective actions in an electromagnetic field and a curved spacetime provided that the field equation has explicitly known solutions. The effective action becomes complex when pairs of charged particles are produced due to an electric field and curved spacetime. This may lead to a conjecture of one-to-one correspondence between the vacuum polarization (real part) and the vacuum persistence (imaginary part). We illustrate the one-loop effective action in a constant electric field in a Minkowski spacetime and in a uniform electric field in a two-dimensional (anti-) de sitter space.
Keywords
Cite
@article{arxiv.1607.08719,
title = {In-Out Formalism for One-Loop Effective Actions in QED and Gravity},
author = {Sang Pyo Kim},
journal= {arXiv preprint arXiv:1607.08719},
year = {2017}
}
Comments
Latex 7 pages; contribution to the Workshop Proceedings of the International Workshop SFP-2016: Strong Field Problems in Quantum Theory, Tomsk, Russia, June 6-11, 2016