An Improved Cosmological Model
arXiv:1606.06967 · doi:10.1103/PhysRevD.94.043508
Abstract
We study a class of non-local, action-based, and purely gravitational models. These models seek to describe a cosmology in which inflation is driven by a large, bare cosmological constant that is screened by the self-gravitation between the soft gravitons that inflation rips from the vacuum. Inflation ends with the universe poised on the verge of gravitational collapse, in an oscillating phase of expansion and contraction that should lead to rapid reheating when matter is included. After the attainment of a hot, dense universe the nonlocal screening terms become constant as the universe evolves through a conventional phase of radiation domination. The onset of matter domination triggers a much smaller anti-screening effect that could explain the current phase of acceleration.
22 pages, 9 figures, uses latex 2e
References in corpus (52)
- Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
- Measurements of Omega and Lambda from 42 High-Redshift Supernovae
- Bouncing Universes in String-inspired Gravity
- Robust Dark Energy Constraints from Supernovae, Galaxy Clustering, and Three-Year Wilkinson Microwave Anisotropy Probe Observations
- The Quantum Gravitational Back-Reaction On Inflation
- Modified non-local-F(R) gravity as the key for the inflation and dark energy
- Quantum Gravity Slows Inflation
- Stochastic Quantum Gravitational Inflation
- Cosmological perturbations and structure formation in nonlocal infrared modifications of general relativity
- Non-local gravity and dark energy
- Towards a Resolution of the Cosmological Singularity in Non-local Higher Derivative Theories of Gravity
- Stochastic Inflationary Scalar Electrodynamics
- Nonlocal action for long-distance modifications of gravity theory
- Generalized ghost-free quadratic curvature gravity
- Accelerating cosmologies from non-local higher-derivative gravity
- Nonlocal Gravity Simulates Dark Matter
- Nonlocal Models of Cosmic Acceleration
- A formal framework for a nonlocal generalization of Einstein's theory of gravitation
- Non-local quantum effects in cosmology 1: Quantum memory, non-local FLRW equations and singularity avoidance
- Generalised Quadratic Curvature, Non-Local Infrared Modifications of Gravity and Newtonian Potentials
- Effective Nonlocal Euclidean Gravity
- Observational Viability and Stability of Nonlocal Cosmology
- Exploring the Properties of Dark Energy Using Type Ia Supernovae and Other Datasets
- Nonlocal Effective Gravitational Field Equations and the Running of Newton's G
- Dark energy and dark matter from nonlocal ghost-free gravity theory
- Screening of cosmological constant in non-local gravity
- Serendipitous discoveries in nonlocal gravity theory
- Screening of cosmological constant in non-local cosmology
- De Sitter Universe in Nonlocal Gravity
- Fading Gravity and Self-Inflation
- Cosmological dynamics and dark energy from non-local infrared modifications of gravity
- Apparent ghosts and spurious degrees of freedom in non-local theories
- Spherically symmetric static solutions in a non-local infrared modification of General Relativity
- Cosmological significance of one-loop effective gravity
- A few cosmological implications of tensor nonlocalities
- Screening of cosmological constant for De Sitter Universe in non-local gravity, phantom-divide crossing and finite-time future singularities
- A Phenomenological Model for the Early Universe
- A Gravitational Mechanism for Cosmological Screening
- Dynamical analysis of cosmology: Impact of initial conditions and constraints from supernovae
- Running of Newton's constant and non integer powers of the d'Alembertian
- New representation of the nonlocal ghost-free gravity theory
- Acausality in Nonlocal Gravity Theory
- Stability analysis and future singularity of the model of non-local gravity
- A Caveat on Building Nonlocal Models of Cosmology
- Quantum Gravity and Inflation
- Post-Inflationary Evolution via Gravitation
- Quantum Cosmology Near Two Dimensions
- Stable Exact Cosmological Solutions in Induced Gravity Models
- Aspects of Infrared Non-local Modifications of General Relativity
- Quantum Cosmology in Four Dimensions
- Quantum gravity of Kerr-Schild spacetimes and the logarithmic correction to Schwarzschild black hole entropy
- Nonlocal General Relativity
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- Revival of the Deser-Woodard nonlocal gravity model: Comparison of the original nonlocal form and a localized formulation
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- Noether symmetry in a nonlocal f(T) Gravity
- Metric for Rotating object in Infrared Corrected Nonlocal Gravity Model
- Non-local cosmological models
- The Case for Nonlocal Modifications of Gravity