Structure Formation in Non-local Bouncing Models
arXiv:2303.17552 · doi:10.1088/1475-7516/2023/05/010
Abstract
In this study, we investigate the growth of structures within the Deser-Woodard nonlocal theory and extend it to various bouncing cosmology scenarios. Our findings show that the observable structure growth rate, , in a vacuum-dominated universe is finite within the redshift range of , contrary to previous literature. Although exhibits no divergences, we observe a slight difference between the evolution of the CDM and the non-local DW II models. Regarding structure formation in bouncing cosmologies, we evaluate the evolution of near the bouncing point. Among the different bouncing cases we explore, the oscillatory bounce and pre-inflationary asymmetrical bounce demonstrate a physical profile where the growth rate begins as a small perturbation in the early epoch and increases with inflation, which can be regarded as the seeds of large-scale structures. These findings are significant because they shed light on the growth of seed fluctuations into cosmic structures resulting from non-local effects.
arXiv comment19 pages, 4 figures;
References in corpus (47)
- Observational Evidence from Supernovae for an Accelerating Universe and a Cosmological Constant
- Measurements of Omega and Lambda from 42 High-Redshift Supernovae
- Unified cosmic history in modified gravity: from F(R) theory to Lorentz non-invariant models
- Modified Gravity Theories on a Nutshell: Inflation, Bounce and Late-time Evolution
- Cosmological Perturbation Theory in the Synchronous vs. Conformal Newtonian Gauge
- Cosmological Perturbation Theory in the Synchronous and Conformal Newtonian Gauges
- Loop Quantum Cosmology: A Status Report
- Cosmic Evolution in a Cyclic Universe
- Absence of Singularity in Loop Quantum Cosmology
- Towards a Nonsingular Bouncing Cosmology
- Nonlocal Cosmology
- Scalar-tensor gravity in an accelerating universe
- Reconstructing the Cosmic Equation of State from Supernova distances
- Bouncing Cosmologies: Progress and Problems
- A Critical Review of Classical Bouncing Cosmologies
- Modified non-local-F(R) gravity as the key for the inflation and dark energy
- Cosmological perturbations and structure formation in nonlocal infrared modifications of general relativity
- Non-local gravity and dark energy
- Non-Singular Bouncing Universes in Loop Quantum Cosmology
- Effective Action of Vacuum: Semiclassical Approach
- Bouncing cosmology in modified Gauss-Bonnet gravity
- The Matter Bounce Scenario in Loop Quantum Cosmology
- Singular Bouncing Cosmology from Gauss-Bonnet Modified Gravity
- Nonlocal gravity. Conceptual aspects and cosmological predictions
- Accelerating cosmologies from non-local higher-derivative gravity
- Phantom and non-phantom dark energy: The cosmological relevance of non-locally corrected gravity
- Bouncing cosmology with future singularity from modified gravity
- Anisotropy in a Nonsingular Bounce
- Effective Nonlocal Euclidean Gravity
- Screening of cosmological constant in non-local gravity
- Serendipitous discoveries in nonlocal gravity theory
- Structure formation in a nonlocally modified gravity model
- Non-Local Gravity Cosmology: an Overview
- Singular Inflation
- A quantitative analysis of singular inflation with scalar-tensor and modified gravity
- Running Coupling Constants, Newtonian Potential and non localities in the Effective Action
- Nonlocal Gravity and Structure in the Universe
- Non-Local Gravity Wormholes
- Testing nonlocal gravity with Lunar Laser Ranging
- Nonlocal Cosmology II --- Cosmic acceleration without fine tuning or dark energy
- Pre-Inflationary Bounce Effects on Primordial Gravitational Waves of Gravity
- Gravitational waves in non-local gravity
- Structure formation in the Deser-Woodard nonlocal gravity model: a reappraisal
- Primordial bouncing cosmology in the Deser-Woodard nonlocal gravity
- Testing non-local gravity by clusters of galaxies
- Structure formation in the new Deser-Woodard nonlocal gravity model
- Non-local gravity in bouncing cosmology scenarios