No accelerating scaling cosmologies at string tree level?
Thomas Van Riet
Abstract
Abstract We investigate the scalar potential in the parametric regime of string moduli space where string loops and higher derivative corrections to 10d supergravity can be ignored and where the fields are rolling down exponential slopes leading to powerlaw FLRW cosmologies, a.k.a. scaling solutions. We argue that these scaling solutions, if describing an accelerating expansion, are likely to be perturbatively unstable, for reasons identical to the perturbative instabilities in tree-level dS vacua.
Topics & Concepts
PhysicsScalingString (physics)Tree (set theory)Theoretical physicsString cosmologyStatistical physicsParticle physicsRelationship between string theory and quantum field theoryQuantum gravityQuantum mechanicsGeometryMathematicsMathematical analysisQuantumBlack Holes and Theoretical PhysicsCosmology and Gravitation TheoriesParticle physics theoretical and experimental studies