Soft theorems in de Sitter spacetime

Abstract

In this paper, we derive a soft photon theorem and a soft gluon theorem in the de Sitter spacetime from the Ward identity of the near cosmological horizon large gauge transformation. Taking the flat limit of the de Sitter spacetime, the soft theorems naturally recover the corresponding flat spacetime soft theorems.

minor revision with clarification of the horizon antipodal matching, published version

References in corpus (3)

• On the consistency relation of the 3-point function in single field inflation
• Constraints from Conformal Symmetry on the Three Point Scalar Correlator in Inflation
• Symmetry Constraints in Inflation, $\alpha$-vacua, and the Three Point Function

Cited by in corpus (4)

• Linearized gravity and soft graviton theorem in de Sitter spacetime
• Near horizon linearized gravity and soft theorem
• Perturbative soft graviton theorems in de Sitter spacetime
• de Sitter corrections to supertranslation Ward identity and soft graviton theorem