Early dark energy triggered by spacetime dynamics that encodes cosmic radiation-matter transition

Abstract

Early dark energy (EDE), introduced at the epoch of matter-radiation equality to alleviate the Hubble tension, has posed a new coincidence problem: why EDE appears at matter-radiation equality when their physics are completely unrelated? To solve this coincidence problem, we propose a new EDE model based on scalar-tensor gravity with the idea that EDE is triggered by spacetime dynamics that encodes cosmic radiation-matter transition. Our model can induce EDE naturally at matter-radiation equality without unnatural parameter tuning. Compared with other EDE models, a distinguishing feature of ours is that it can also induce a new energy component during cosmic matter-dark energy transition. This is testable with low-redshift observations.

arXiv comment9 pages, 7 figures, published in Phys. Rev. D

References in corpus (36)

• A Comprehensive Measurement of the Local Value of the Hubble Constant with 1 km/s/Mpc Uncertainty from the Hubble Space Telescope and the SH0ES Team
• In the Realm of the Hubble tension $-$ a Review of Solutions
• Large Magellanic Cloud Cepheid Standards Provide a 1% Foundation for the Determination of the Hubble Constant and Stronger Evidence for Physics Beyond LambdaCDM
• The Pantheon+ Analysis: Cosmological Constraints
• Early Dark Energy Can Resolve The Hubble Tension
• The Hubble Hunter's Guide
• Dynamical dark energy in light of the latest observations
• Scalar-tensor gravity in an accelerating universe
• Dark energy cosmology from higher-order, string-inspired gravity and its reconstruction
• Early dark energy, the Hubble-parameter tension, and the string axiverse
• Oscillating scalar fields and the Hubble tension: a resolution with novel signatures
• CosmoSIS: modular cosmological parameter estimation
• Scalar-Tensor Gravity and Quintessence
• Observational Constraints on Dark Energy and Cosmic Curvature
• Early dark energy from massive neutrinos -- a natural resolution of the Hubble tension
• Phenomenological parameterization of quintessence
• Sounds Discordant: Classical Distance Ladder & $\Lambda$CDM -based Determinations of the Cosmological Sound Horizon
• Confirmation of a Star Formation Bias in Type Ia Supernova Distances and its Effect on Measurement of the Hubble Constant
• Quantifying discordance in the 2015 Planck CMB spectrum
• Planck Data Reconsidered
• Early modified gravity in light of the $H_0$ tension and LSS data
• Dark energy from the string axiverse
• Unified framework for Early Dark Energy from $\alpha$-attractors
• Should Type Ia Supernova Distances be Corrected for their Local Environments?
• Axion-Dilaton Destabilization and the Hubble Tension
• How early is early dark energy?
• Gravity in the Era of Equality: Towards solutions to the Hubble problem without fine-tuned initial conditions
• Distance Priors from Planck and Dark Energy Constraints from Current Data
• Neutrino-Assisted Early Dark Energy: Theory and Cosmology
• Robust and model-independent cosmological constraints from distance measurements
• Exploring Early Dark Energy solution to the Hubble tension with Planck and SPTPol data
• Early dark energy in $k$-essence
• A Dark Matter Trigger for Early Dark Energy Coincidence
• Early Dark Energy from a Higher-dimensional Gauge Theory
• Pantheon+ constraints on dark energy and modified gravity: An evidence of dynamical dark energy
• Gravitation with modified fluid Lagrangian: Variational principle and an early dark energy model