Perturbative soft graviton theorems in de Sitter spacetime
High Energy Physics - Theory
2025-12-08 v4 General Relativity and Quantum Cosmology
Abstract
We consider soft graviton scattering for a theory where Einstein's gravity is minimally coupled to a scalar field in the presence of a cosmological constant, i.e. in a background de Sitter space. Employing a perturbative expansion in a small cosmological constant, we compute leading, subleading and sub-subleading corrections to Weinberg's soft graviton amplitude for the tree-level scatterings in the static patch of de Sitter space. We observe similar universal features of the soft graviton amplitude as found in [JHEP10(2023)055] for the soft photons.
Cite
@article{arxiv.2502.03481,
title = {Perturbative soft graviton theorems in de Sitter spacetime},
author = {Divyesh N. Solanki and Pratik Chattopadhyay and Srijit Bhattacharjee},
journal= {arXiv preprint arXiv:2502.03481},
year = {2025}
}
Comments
Affiliation corrected, published version in JHEP