Towards a nonsingular tachyonic big crunch

2007/05/31 by Robert Brandenberger, Robert H. Brandenberger, Andrew R. Frey +1 · 3 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Noncommutative and Quantum Gravity Theories #astro-ph #gr-qc #hep-ph #hep-th

paper · pdf · doi:10.1103/physrevd.76.063502

published as Phys.Rev.D76:063502,2007 · 7 pages, two references added

arxiv created 2007/06/02 · openalex publication_date 2007/09/10 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/30

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 nonvanishing 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.

Citations

• Moduli (Dilaton, Volume and Shape) Stabilization via Massless F and D String Modes
• A fine tuning free resolution of the cosmological constant problem

Cited by

• Large radius Hagedorn regime in string gas cosmology
• Speed of sound in string gas cosmology
• Supersymmetry breaking and dilaton stabilization in string gas cosmology

Related

• Light-like tachyon condensation in Open String Field Theory
• Rolling Tachyon with Electromagnetic Field in Linear Dilaton Background
• Rolling Solution for Tachyon Condensation in Open String Field Theory
• Unstable D-branes and String Cosmology
• The Closed String Tachyon and its relationship with the evolution of the Universe