GRG Editor's Choice: Null infinity, the BMS group and infrared issues

Ashtekar, A., Campiglia, M. & Laddha, A., Null infinity, the BMS group and infrared issues, Gen Relativ Gravit (2018) 50: 140. https://doi.org/10.1007/s10714-018-2464-3

Editor's Choice (Invited Report: Introduction to Current Research)

First Online: 10 October 2018

"This beautiful paper offers a very useful panoramic of fundamental but also of subtle and new aspects on a current hot topic of research."

Abstract:

There has been a recent resurgence of interest in the structure of the gravitational field at null infinity, sparked by new results on soft charges and infrared issues related to the S matrix theory in perturbative quantum gravity. We summarize these developments and put them in the broader context of research in the relativity community that dates back to several decades. In keeping with intent of this series, this overview is addressed to gravitational scientists who are not experts in this specific area.

The authors:  Abhay Ashtekar is Eberly Professor of Physics and Director of the Institute for Gravitation and the Cosmos at Penn State University, USA. He has been Editor-in-Chief of the journal General Relativity and Gravitation (2012-2018) and co-editor of the Springer Handbook of Spacetime (2014).

Miguel Campiglia is Adjunct Professor at the Instituto de Física de la Facultad de Ciencias, Montevideo, Uruguay. Recently, he has been awarded the Premio Excelencia Elsevier - Uruguay 2018.

Alok Laddha is Associate Professor of Physics at the Chennai Mathematical Institute, India.

GRG Editor's Choice:

In each volume of GRG, a few papers are marked as “Editor’s Choice”. The primary criteria is original, high quality research that is of wide interest within the community.