Cosmological bootstrap

TL;DR

This paper presents a supergravity-based model linking the cosmological constant to inflation, where quantum corrections induce a dynamical relaxation of the initial large cosmological constant, aligning with observational data.

Contribution

It introduces a superpotential model that naturally relaxes a large cosmological constant through inflation driven by quantum corrections.

Findings

Model agrees with large-scale structure observations

Provides a mechanism for dynamical relaxation of the cosmological constant

Links inflationary dynamics with fundamental particle physics parameters

Abstract

A huge value of cosmological constant characteristic for the particle physics and the inflation of early Universe are inherently related to each other: one can construct a fine-tuned superpotential, which produces a flat potential of inflaton with a constant density of energy $V=\Lambda^4$ after taking into account for leading effects due to the supergravity, so that an introduction of small quantum loop-corrections to parameters of this superpotential naturally results in the dynamical instability relaxing the primary cosmological constant by means of inflationary regime. The model phenomenologically agrees with observational data on the large scale structure of Universe at $\Lambda~10^{16}$ GeV.