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.

12 pages; comments welcome

References in corpus (11)

• The Swampland: Introduction and Review
• The String Landscape and the Swampland
• Lectures on the Swampland Program in String Compactifications
• Tensor Modes from a Primordial Hagedorn Phase of String Cosmology
• Complex Langevin analysis of the space-time structure in the Lorentzian type IIB matrix model
• Closed String Thermodynamics and a Blue Tensor Spectrum
• Emergent Gravity, Matrix Models and UV/IR Mixing
• Phase structure of matrix quantum mechanics at finite temperature
• More on the Spectrum of Perturbations in String Gas Cosmology
• High temperature expansion in supersymmetric matrix quantum mechanics
• New perspectives on the emergence of (3+1)D expanding space-time in the Lorentzian type IIB matrix model

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
• Comparing Quantum Gravity Models: String Theory, Loop Quantum Gravity, and Entanglement gravity versus $SU(\infty )$-QGR
• A Bouncing Cosmology from VECROs
• What if string theory has a de Sitter excited state?
• Large N Optimization for multi-matrix systems
• Spatially flat FLRW spacetimes with a Big Bang from matrix geometry
• Is Planckian discreteness observable in cosmology?
• Testing quantum gravity with primordial gravitational waves
• Quantum Gravity, Hydrodynamics and Emergent Cosmology: A Collection of Perspectives
• Probing the self-coherence of primordial quantum fluctuations with complexity
• Spatially flat cosmological quantum spacetimes
• Turbulent aspects of BMN membrane dynamics
• Fuzzy Black Holes from Mass Generation in Matrix Compactification
• Collective field theory of gauged multi-matrix models: Integrating out off-diagonal strings