Cosmological models with Gurzadyan-Xue dark energy

Abstract

The formula for dark energy density derived by Gurzadyan and Xue provides a value of density parameter of dark energy in remarkable agreement with current cosmological datasets, unlike numerous phenomenological dark energy scenarios where the corresponding value is postulated. This formula suggests the possibility of variation of physical constants such as the speed of light and the gravitational constant. Considering several cosmological models based on that formula and deriving the cosmological equations for each case, we show that, in all models source terms appear in the continuity equation. So, one one hand, GX models make up a rich set covering a lot of currently proposed models of dark energy, on the other hand, they reveal hidden symmetries, with a particular role of the separatrix ${\Omega }_m=2/3$, and link with the issue of the content of physical constants.

figure 3 and typos are corrected, version matches the one to appear in Classical and Quantum Gravity

References in corpus (5)

• Running G and Λat low energies from physics at M_X: possible cosmological and astrophysical implications
• Bouncing Universes with Varying Constants
• Decay of the vacuum energy into CMB photons
• Physical constants and the Gurzadyan-Xue formula for the dark energy
• Hidden invariance in Gurzadyan-Xue cosmological models

Cited by in corpus (16)

• The dark energy equation of state
• Dark energy models with time-dependent gravitational constant
• Variable Equation of State for Generalized Dark Energy Model
• $\Lambda$-CDM Universe: A Phenomenological Approach With Many Possibilities
• Phenomenology of $\Lambda$-CDM model: a possibility of accelerating Universe with positive pressure
• Ellipticity in Cosmic Microwave Background as a Tracer of Large-Scale Universe
• Dark Energy From Vacuum Fluctuations
• Hubble Diagram of Gamma-Rays Bursts calibrated with Gurzadyan-Xue Cosmology
• A Dark Energy Model in Kaluza-Klein Cosmology
• Phenomenological Dark Energy model with hybrid dynamic Cosmological Constant
• Generalized Model for $\Lambda$-Dark Energy
• Scenario of Accelerating Universe from the Phenomenological Λ- Models
• Invariants and solutions of Gurzadyan-Xue dark energy cosmological models
• Nonparametric determination of redshift evolution index of Dark Energy
• Dynamics of perturbations in Gurzadyan-Xue cosmological models
• The Djorgovski-Gurzadyan dark energy integral equation and the Hubble diagram