A Brief Comment on Instanton-like Singularities and Cosmological Horizons

TL;DR

This paper discusses how instanton-like singularities can make the presence of cosmological horizons dependent on the frame of reference, impacting the understanding of quantum gravity in de Sitter space.

Contribution

It highlights the frame-dependence of cosmological horizons in the presence of instanton-like singularities and explores implications for quantum gravity formulations.

Findings

Cosmological horizons may not be invariant under frame transformations.

Instanton-like singularities influence the existence of horizons.

Implications for quantum gravity in de Sitter space are discussed.

Abstract

We argue that in the presence of instanton-like singularities, the existence of cosmological horizons can become frame-dependent, ie. a horizon which appears in Einstein frame may not appear in string frame. We speculate on the relation between instanton-like singularities and the formulation of quantum gravity in de Sitter space.