Holography as Cutoff: a proposal for measure of inflationary universes

TL;DR

This paper proposes using the holographic principle as a dynamic cutoff in quantum gravity theories, offering a new way to define measures for inflationary universes and exploring implications for inflation models.

Contribution

It introduces a novel approach to applying the holographic principle as a cutoff in quantum gravity, impacting the measure problem in cosmology.

Findings

Holography can serve as a dynamical cutoff in quantum gravity.

Revisits measure problem for inflationary spacetimes.

Discusses implications for inflationary models.

Abstract

We propose the holographic principle as a dynamical cutoff for any quantum theory of gravity with a geometric description at low energies, incorporating ideas of effective field theory. We illustrate the proposal by revisiting the problem of defining a measure for homogeneous and isotropic spacetimes coupled to a scalar field and conclude by discussing the implications to the inflationary model.