Cosmic Acceleration and the String Coupling

Abstract

In the context of a cosmological string model describing the propagation of strings in a time-dependent Robertson-Walker background space-time, we show that the asymptotic acceleration of the Universe can be identified with the square of the string coupling. This allows for a direct measurement of the ten-dimensional string coupling using cosmological data. We conjecture that this is a generic feature of a class of non-critical string models that approach asymptotically a conformal (critical) sigma model whose target space is a four-dimensional space-time with a dilaton background that is linear in sigma-model time. The relation between the cosmic acceleration and the string coupling does not apply in critical strings with constant dilaton fields in four dimensions.

16 pages

References in corpus (2)

• The Anthropic Landscape of String Theory
• Brany Liouville Inflation

Cited by in corpus (26)

• Using the Noether symmetry approach to probe the nature of dark energy
• Dynamical analysis in scalar field cosmology
• Confronting Dark Energy Models using Galaxy Cluster Number Counts
• Potentials between D-Branes in a Supersymmetric Model of Space-Time Foam
• Decoherence induced CPT violation and entangled neutral mesons
• Smoothly evolving Supercritical-String Dark Energy relaxes Supersymmetric-Dark-Matter Constraints
• Dynamical symmetries and observational constraints in scalar field cosmology
• Liouville Decoherence in a Model of Flavour Oscillations in the presence of Dark Energy
• Cosmology is not a Renormalization Group Flow
• Dark Matter, Proton Decay and Other Phenomenological Constraints in $\mathcal{F}$-SU(5)
• Dissipative Liouville Cosmology: A Case Study
• Supersymmetry Signals of Supercritical String Cosmology at the Large Hadron Collider
• Dynamics and constraints of the dissipative Liouville cosmology
• Observational Evidence for Negative-Energy Dust in Late-Times Cosmology
• String-Inspired Running Vacuum, the "Vacuumon", and the Swampland Criteria
• Supercritical String Cosmology drains the Swampland
• Tachyon-Dilaton-induced Inflation as an alpha'-resummed String Background
• Supergravity and Superstring Signatures of the One-Parameter Model at LHC
• The Search for a Realistic String Model at LHC
• The issue of Dark Energy in String Theory
• Stringy WIMP Detection and Annihilation
• A Note on Modulus-dominated SUSY-breaking
• A novel non-perturbative approach to String Cosmology
• Constraining super-critical string/brane cosmologies with astrophysical data
• The String Coupling Accelerates the Expansion of the Universe
• An Alternative to Exact Renormalization and Cosmological Solutions in String Theory