String Cosmology and the Breakdown of Local Effective Field Theory
arXiv:2112.04082
Abstract
Most current cosmological models of the very early universe are based on local point particle effective field theories coupled to gravity. I will discuss some conceptual limitations of this approach and argue that an improved description of the early universe needs to go beyond this framework. I will outline a couple of ideas based on superstring theory.
Invited talk at the workshop "Quantum Gravity, Higher Derivatives and Nonlocality", March 9 - 13 2021; 12 pages