Cosmological solutions of supercritical string theory
arXiv:hep-th/0611317 · doi:10.1103/PhysRevD.77.126011
Abstract
We study quintessence-driven, spatially flat, expanding FRW cosmologies that arise naturally from string theory formulated in a supercritical number of spacetime dimensions. The tree-level potential of the string theory produces an equation of state at the threshold between accelerating and decelerating cosmologies, and the resulting spacetime is globally conformally equivalent to Minkowski space. We demonstrate that exact solutions exist with a condensate of the closed-string tachyon, the simplest of which is a Liouville wall moving at the speed of light. We rely on the existence of this solution to derive constraints on the couplings of the tachyon to the dilaton and metric in the string theory effective action. In particular, we show that the tachyon dependence of the Einstein term must be nontrivial.
v2: typos corrected and references added; v3: minor corrections; 35 pages, 9 figures
References in corpus (5)
Cited by in corpus (18)
- Dimension-changing exact solutions of string theory
- Charting the landscape of supercritical string theory
- Supercritical stability, transitions and (pseudo)tachyons
- A Short Review of Time Dependent Solutions and Space-like Singularities in String Theory
- New Dimensions for Wound Strings: The Modular Transformation of Geometry to Topology
- Future Foam
- Dynamics and Stability of Light-Like Tachyon Condensation
- String spectra near some null cosmological singularities
- Cosmology of the closed string tachyon
- Supercritical N = 2 string theory
- Dimensional Duality
- M-Theory Through the Looking Glass: Tachyon Condensation in the E_8 Heterotic String
- Light-like tachyon condensation in Open String Field Theory
- A stable vacuum of the tachyonic E8 string
- World Sheet Commuting βγCFT and Non-Relativistic String Theories
- Supercriticality of a Class of Critical String Cosmological Solutions
- A note on tachyon actions in string theory
- D-dualized D-brane