Curvaton and quantum gravity effect on the tensor to scalar ratio of the chaotic inflation

TL;DR

This paper explores how the curvaton and quantum gravity effects can influence the tensor-to-scalar ratio in chaotic inflation, potentially lowering its expected value and offering new ways to test early universe physics.

Contribution

It introduces a combined framework of curvaton and quantum gravity effects in chaotic inflation to explain possible deviations in tensor-to-scalar ratio measurements.

Findings

Quantum gravity and curvaton effects can lower the tensor-to-scalar ratio.

These effects can be tested through upcoming CMB observations.

The role of quantum gravity and curvaton in early universe dynamics remains viable.

Abstract

The expected tensor-to-scalar ratio estimate of the upcoming CMB mission probe measurements may establish a lower value of the ratio than the currently obtained value. It can be described in terms of a single field chaotic inflation model along with the curvaton or quantum gravity or their combined effect. Consequently, the role of quantum gravity or curvaton in the dynamics of the early universe may not be ruled out. The curvaton scenario and quantum gravity effect can be tested experimentally.