Non-oscillating Early Dark Energy and Quintessence from Alpha-Attractors

Abstract

Early dark energy (EDE) is one of the most promising possibilities in order to resolve the Hubble tension: the discrepancy between early and late-Universe measurements of the Hubble constant. In this paper we propose a model of a scalar field which can explain both EDE and late Dark Energy (DE) in a joined manner without additional fine-tuning. The field features kinetic poles as with alpha-attractors. Our model provides an injection of EDE near matter-radiation equality, and redshifts away shortly after via free-fall, later refreezing to become late-time DE at the present day. Using reasonable estimates of the current constraints on EDE from the literature, we find that the parameter space is narrow but viable. As such our model is readily falsifiable. In contrast to other work in EDE, our model is non-oscillatory, which causes its decay to be faster than that of the usual oscillatory EDE, thereby achieving better agreement with observations.

25 pages, 9 figures, 5 tables. Published version

References in corpus (45)

• Dynamics of dark energy
• 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
• The Standard Model Higgs boson as the inflaton
• BICEP / Keck XIII: Improved Constraints on Primordial Gravitational Waves using Planck, WMAP, and BICEP/Keck Observations through the 2018 Observing Season
• On the Hubble constant tension in the SNe Ia Pantheon sample
• Early dark energy, the Hubble-parameter tension, and the string axiverse
• On the evolution of the Hubble constant with the SNe Ia Pantheon Sample and Baryon Acoustic Oscillations: a feasibility study for GRB-cosmology in 2030
• Consistency tests of $\Lambda$CDM from the early integrated Sachs-Wolfe effect: Implications for early-time new physics and the Hubble tension
• Arbitrating the $S_8$ discrepancy with growth rate measurements from Redshift-Space Distortions
• Early dark energy is not excluded by current large-scale structure data
• Large Field Inflation and Double $\alpha$-Attractors
• Planck, LHC, and $\alpha$-attractors
• Unifying of Inflation with Early and Late Dark Energy Epochs in Axion $F(R)$ Gravity
• Is Local $H_0$ At Odds With Dark Energy EFT?
• Restoring cosmological concordance with early dark energy and massive neutrinos?
• Limits on Dark Radiation, Early Dark Energy, and Relativistic Degrees of Freedom
• Comparing early dark energy and extra radiation solutions to the Hubble tension with BBN
• Implication of the Hubble tension for the primordial Universe in light of recent cosmological data
• Cosmological Attractor Models and Higher Curvature Supergravity
• Inflationary $\alpha$-attractors from $F(R)$ Gravity
• Towards early dark energy and $n_s$=1 with Planck, ACT and SPT
• No-go guide for the Hubble tension : Late-time solutions
• $T_0$ censorship of early dark energy and AdS vacua
• Hybrid cosmological attractors
• Does the first chaotic inflation model in supergravity provide the best fit to the Planck data?
• Coupled and uncoupled early dark energy, massive neutrinos and the cosmological tensions
• Isotropic cosmic birefringence from early dark energy
• Towards hybrid inflation with $n_s=1$ in light of Hubble tension and primordial gravitational waves
• Probing elastic interactions in the dark sector and the role of $S_8$
• Chain Early Dark Energy: Solving the Hubble Tension and Explaining Today's Dark Energy
• Modelling and testing the equation of state for (Early) dark energy
• Multi-interacting dark energy and its cosmological implications
• Return of Harrison-Zeldovich spectrum in light of recent cosmological tensions
• No-go guide for late-time solutions to the Hubble tension: Matter perturbations
• No H_0 Assistance from Assisted Quintessence
• Microphysics of Early Dark Energy
• Multiple transitions in vacuum dark energy and $H_0$ tension
• Probing Early Modification of Gravity with Planck, ACT and SPT
• Thermal Friction as a Solution to the Hubble and Large-Scale Structure Tensions
• Quintessential Cosmological Tensions
• Alleviating Cosmological Tensions with a Coupled Scalar Fields Model
• Unifying Inflation with early and late Dark Energy in Multi-Fields: Spontaneously broken scale invariant TMT
• Kinetically Coupled Scalar Fields Model and Cosmological Tensions
• Early dark energy and the screening mechanism
• Scrutinizing Early Dark Energy models through CMB lensing

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• Cosmic magnification in beyond-Horndeski gravity