Emergent Cosmology from Matrix Theory

Abstract

Matrix theory is a proposed non-perturbative definition of superstring theory in which space is emergent. We begin a study of cosmology in the context of matrix theory. Specifically, we show that matrix theory can lead to an emergent non-singular cosmology which, at late times, can be described by an expanding phase of Standard Big Bang cosmology. The horizon problem of Standard Big Bang cosmology is automatically solved. We show that thermal fluctuations in the emergent phase source an approximately scale-invariant spectrum of cosmological perturbations and a scale-invariant spectrum of gravitational waves. Hence, it appears that matrix theory can lead to a successful scenario for the origin of perturbations responsible for the currently observed structure in the universe while providing a consistent UV-complete description.

arXiv comment12 pages; comments welcome

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Cited by in corpus (22)

• On the propagation across the big bounce in an open quantum FLRW cosmology
• Progress in the numerical studies of the type IIB matrix model
• Emergent Metric Space-Time from Matrix Theory
• One-loop effective action of the IKKT model for cosmological backgrounds
• Visions in Quantum Gravity
• Quantum resolution of the cosmological singularity without new physics
• Complex Langevin studies of the emergent space-time in the type IIB matrix model
• Towards an "AdS${}_1/$CFT${}_0$" correspondence from the D$(-1)/$D$7$ system?
• Limitations of an Effective Field Theory Treatment of Early Universe Cosmology
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• Collective field theory of gauged multi-matrix models: Integrating out off-diagonal strings