Puzzling initial conditions in the R_h=ct model

Abstract

In recent years, some studies have drawn attention to the lack of large-angle correlations in the observed cosmic microwave background (CMB) temperature anisotropies with respect to that predicted within the standard $\Lambda$CDM model. Lately, it has been argued that such a lack of correlations could be explained in the framework of the so-called $R_h=ct$ model without inflation. The aim of this work is to study whether there is a mechanism to generate, through a quantum field theory, the primordial power spectrum presented by these authors. Specifically, we consider two different scenarios: first, we assume a scalar field dominating the early Universe in the $R_h=ct$ cosmological model, and second, we deal with the possibility of adding an early inflationary phase to the mentioned model. During the analysis of the consistency between the predicted and observed amplitudes of the CMB temperature anisotropies in both scenarios, we run into deep issues which indicate that it is not clear how to characterize the primordial quantum perturbations within the $R_h=ct$ model.

14 pages. Final version, improved with additional comments. To appear in EPJC

References in corpus (9)

• A Joint Analysis of BICEP2/Keck Array and Planck Data
• The Uncorrelated Universe: Statistical Anisotropy and the Vanishing Angular Correlation Function in WMAP Years 1-3
• We do not live in the R_h = c t universe
• Robust model comparison disfavors power law cosmology
• A Comparison of Cosmological Models Using Time Delay Lenses
• Primordial Nucleosynthesis in the Rh = ct cosmology: Pouring cold water on the Simmering Universe
• Constraints on Dark Energy from the Observed Expansion of our Cosmic Horizon
• The Tachyon Propagator
• Another coincidence problem for $\Lambda$CDM?

Cited by in corpus (4)

• Model Comparison of $\Lambda$CDM vs $R_h=ct$ using Cosmic Chronometers
• Theory of gravity admitting arbitrary choice of the energy density reference level
• Reference level of the vacuum energy density of the Universe and astrophysical data
• Plasma Perturbations and Cosmic Microwave Background Anisotropy in the Linearly Expanding Milne-like Universe