One-loop corrections to a scalar field during inflation

TL;DR

This paper calculates the main quantum correction to the power spectrum of a light scalar field during single-field slow-roll inflation, providing insights into quantum effects in early universe cosmology.

Contribution

It presents the first detailed calculation of one-loop quantum corrections to a scalar field's power spectrum during inflation.

Findings

Quantum corrections modify the scalar power spectrum.

Results are relevant for understanding primordial fluctuations.

Provides a framework for future quantum cosmology studies.

Abstract

The leading quantum correction to the power spectrum of a gravitationally-coupled light scalar field is calculated, assuming that it is generated during a phase of single-field, slow-roll inflation.