Early dark energy and the screening mechanism

Abstract

In the early Universe, dark energy may have a non-negligible contribution. If this dark energy corresponds to an early cosmological constant, it leads to a late-time huge dark energy density which is much larger than what is expected for the current expansion of the Universe. Using a conformal coupling of the quintessence to the dark matter, and based on the screening models, we propose a process to reduce the early dark energy to its ultimate value in the late time. Early and late time dark energies can be unified in a single component, in this way.

16 pages, 5 figures, discussions added

References in corpus (7)

• Dark energy cosmology: the equivalent description via different theoretical models and cosmography tests
• Early dark energy, the Hubble-parameter tension, and the string axiverse
• Dynamics of dark energy with a coupling to dark matter
• Observables and unobservables in dark energy cosmologies
• Analyzing the $H_0$ tension in $F(R)$ gravity models
• Transition from quintessence to phantom phase in quintom model
• Oscillating scalar fields in extended quintessence

Cited by in corpus (5)

• Seven hints that early-time new physics alone is not sufficient to solve the Hubble tension
• Testing the $n_s-H_0$ scaling relation with Planck-independent CMB data
• Non-oscillating Early Dark Energy and Quintessence from Alpha-Attractors
• Does the fraction of dark matter diminish with early dark energy?
• Early dark energy and scalarization in a scalar-tensor model