Quantum Noise and Fluctuations in Gravitation and Cosmology

TL;DR

This paper reviews recent advances in applying nonequilibrium statistical field theory and stochastic gravity to quantum processes in the early universe and black holes, aiming to bridge semiclassical and quantum gravity.

Contribution

It introduces developments in stochastic gravity as an extension of semiclassical gravity and as a step towards understanding quantum gravity from a bottom-up perspective.

Findings

Enhanced understanding of quantum processes in early universe and black holes

Development of stochastic gravity as a bridge between semiclassical and quantum gravity

Framework for future research in quantum gravity theories

Abstract

We give a short update of our research program on nonequilibrium statistical field theory applied to quantum processes in the early universe and black holes, as well as the development of stochastic gravity theory as an extension of semiclassical gravity and an intermediary in the 'bottom-up' approach to quantum gravity.