Quantum Gravity and Phenomenology: Dark Matter, Dark Energy, Vacuum Selection, Emergent Spacetime, and Wormholes

TL;DR

This paper explores how quantum gravity theories, especially string theory, can address key cosmological and spacetime puzzles like dark matter, dark energy, vacuum selection, emergent spacetime, and wormholes.

Contribution

It connects quantum gravity concepts with phenomenological issues in cosmology, highlighting the roles of string theory and effective theories in understanding these phenomena.

Findings

String theory provides a framework for dark matter and dark energy phenomenology.

Emergent spacetime offers insights into the nature of spacetime at quantum scales.

Wormholes are discussed as features of effective quantum gravity theories.

Abstract

We discuss the relevance of quantum gravity to the frontier questions in high energy phenomenology: the problems of dark matter, dark energy, and vacuum selection as well as the problems of emergent spacetime and wormholes. Dark matter and dark energy phenomenology, and the problem of vacuum selection are discussed within the context of string theory as a model of quantum gravity. Emergent spacetime and wormholes are discussed in a more general context of effective theories of quantum gravity.