Universal scattering laws for quiescent bouncing cosmology
arXiv:2006.08620 · doi:10.1103/PhysRevD.103.083531
Abstract
Cosmological bounces occur in many gravity theories. We define singularity scattering maps relating large scale geometries before and after the bounce (assuming no BKL oscillations) and encoding microscopic details of the theory. By classifying all suitably local maps we uncover three universal laws: scaling of Kasner exponents, canonical transformation of matter, directional metric scaling. These are indeed obeyed by Bianchi I bounces in string theory, loop quantum cosmology and modified matter models; our classification then determines how inhomogeneities and anisotropies traverse bounces, and precisely extracts model-dependent degrees of freedom.
arXiv comment6 pages; updated presentation of the three laws
References in corpus (20)
- The Ekpyrotic Universe: Colliding Branes and the Origin of the Hot Big Bang
- Pre-Big-Bang in String Cosmology
- The Pre-Big Bang Scenario in String Cosmology
- Bouncing Cosmologies: Progress and Problems
- Loop quantum cosmology of Bianchi I models
- Quiescent cosmological singularities
- Generating Ekpyrotic Curvature Perturbations Before the Big Bang
- Numerical Approaches to Spacetime Singularities
- Bouncing cosmologies with dark matter and dark energy
- Singularity Resolution in Loop Quantum Cosmology: A Brief Overview
- Cyclic Cosmology, Conformal Symmetry and the Metastability of the Higgs
- Supersmoothing through Slow Contraction
- The loop quantum cosmology bounce as a Kasner transition
- Beyond Inflation: A Cyclic Universe Scenario
- Robustness of slow contraction to cosmic initial conditions
- A generalized Kasner transition for bouncing Bianchi I models in modified gravity theories
- Compensated compactness and corrector stress tensor for the Einstein equations in T2 symmetry
- On the global evolution of self-gravitating matter. Nonlinear interactions in Gowdy symmetry
- Regularization of the big bang singularity with a time varying equation of state
- Regularization of the big bang singularity with random perturbations