Perspectives on the Dark Sector

TL;DR

This paper explores innovative perspectives on Dark Matter, Dark Energy, and cosmic structure, emphasizing the need for beyond-standard models and discussing string theory approaches to early universe cosmology.

Contribution

It introduces new viewpoints on the dark sector, reviews efforts to unify dark matter and energy from string theory, and proposes a non-perturbative approach to early universe cosmology.

Findings

Highlighting the limitations of effective field theory in cosmology

Review of string theory models for dark sector unification

Proposal for non-perturbative string theory in early universe

Abstract

I present some new perspectives on Dark Matter, Dark Energy and the origin of structure in the Universe. First, I argue that in order to understand the two latter issues, one needs to go beyond a standard point particle effective field theory analysis. Next, I review recent work attempting to construct a unified dark sector model from Heterotic superstring theory. I finish by discussing a new research effort to obtain early Universe cosmology directly from a non-perturbative definition of superstring theory.