# Lorenz-gauge reconstruction for Teukolsky solutions with sources in electromagnetism

### APA

Green, S. (2021). Lorenz-gauge reconstruction for Teukolsky solutions with sources in electromagnetism. Perimeter Institute. https://pirsa.org/21060044

### MLA

Green, Stephen. Lorenz-gauge reconstruction for Teukolsky solutions with sources in electromagnetism. Perimeter Institute, Jun. 09, 2021, https://pirsa.org/21060044

### BibTex

@misc{ pirsa_PIRSA:21060044, doi = {10.48660/21060044}, url = {https://pirsa.org/21060044}, author = {Green, Stephen}, keywords = {Other}, language = {en}, title = {~Lorenz-gauge reconstruction for Teukolsky solutions with sources in electromagnetism}, publisher = {Perimeter Institute}, year = {2021}, month = {jun}, note = {PIRSA:21060044 see, \url{https://pirsa.org}} }

University of Nottingham

Talk Type

**Subject**

Abstract

Reconstructing a metric or vector potential that corresponds to a given solution to the Teukolsky equation is an important problem for self-force calculations. Traditional reconstruction algorithms do not work in the presence of sources, and they give rise to solutions in a radiation gauge. In the electromagnetic case, however, Dolan (2019) and Wardell and Kavanagh (2020) very recently showed how to reconstruct a vector potential in Lorenz gauge, which is more convenient for self-force. Their algorithm is based on a new Hertz-potential 2-form. In this talk, I will first show that the electromagnetic Teukolsky formalism takes a simplified form when expressed in terms of differential forms and the exterior calculus. This formalism makes the new Lorenz-gauge construction much more transparent, and it enables an extension to nonzero sources. In particular, I will derive a corrector term, related to the charge current, which when added to the vector potential gives a solution to the Maxwell equations with nonzero source. I will conclude by discussing prospects for extending to the gravitational case.