Towards A Nonsingular Tachyonic Big Crunch

Abstract

We discuss an effective field theory background containing the gravitational field, the dilaton and a closed string tachyon, and couple this background to a gas of fundamental strings and D strings. Allowing for the possibility of a non-vanishing dilaton potential of Casimir type, we demonstrate the possibility of obtaining a nonsingular, static tachyon condensate phase with fixed dilaton. The time reversal of our solution provides a candidate effective field theory description of a Hagedorn phase of string gas cosmology with fixed dilaton.

7 pages, two references added

References in corpus (33)

• Strong-Weak Coupling Duality in Four Dimensional String Theory
• Bouncing Universes in String-inspired Gravity
• Elements of String Cosmology
• Producing a Scale-Invariant Spectrum of Perturbations in a Hagedorn Phase of String Cosmology
• Duality Symmetries of 4D Heterotic Strings
• String Gas Cosmology
• Tensor Modes from a Primordial Hagedorn Phase of String Cosmology
• A Matrix Big Bang
• Towards a Big Crunch Dual
• Holographic Description of AdS Cosmologies
• String Gas Cosmology and Structure Formation
• Time Dependent Cosmologies and Their Duals
• The Tachyon at the End of the Universe
• Matrix Cosmology
• A Closed String Tachyon Vacuum ?
• M Theory Model of a Big Crunch/Big Bang Transition
• Closed String Tachyon Condensation: An Overview
• Time-dependent AdS/CFT Duality and Null Singularity
• Effective Dynamics of the Matrix Big Bang
• Cosmologies with Null Singularities and their Gauge Theory Duals
• Time-dependent Solutions with Null Killing Spinor in M-theory and Superstrings
• More on the Spectrum of Perturbations in String Gas Cosmology
• A Matrix Model for Misner Universe and Closed String Tachyons
• Matrix String Description of Cosmic Singularities in a Class of Time-dependent Solutions
• Rolling Closed String Tachyons and the Big Crunch
• Dilaton Dynamics from Production of Tensionless Membranes
• On the new string theory inspired mechanism of generation of cosmological perturbations
• Toward the End of Time
• Challenges for String Gas Cosmology
• Moduli (Dilaton, Volume and Shape) Stabilization via Massless F and D String Modes
• Dual of Big-bang and Big-crunch
• The Nothing at the Beginning of the Universe Made Precise
• A fine tuning free resolution of the cosmological constant problem

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• Cyclic Inflation
• Unconventional Cosmology
• Supersymmetry Breaking and Dilaton Stabilization in String Gas Cosmology
• Emergence of Fluctuations from a Tachyonic Big Bang
• Tachyon potentials from a supersymmetric FRW model
• Speed of Sound in String Gas Cosmology
• Large Radius Hagedorn Regime in String Gas Cosmology
• A note on tachyon actions in string theory
• D-dualized D-brane
• Closed String Tachyon Driving $f(R)$ Cosmology