Dissipative Quintessential Cosmic Inflation
Kourosh Nozari, Fateme Rajabi, Narges Rashidi

TL;DR
This paper develops a dissipative quintessence model for cosmic inflation, analyzing its predictions and constraints using observational data, and explores its consistency with various potentials and dissipation functions.
Contribution
It introduces a novel dissipative term in the quintessence inflation model and performs detailed analysis of inflationary parameters and observational constraints.
Findings
Power-law potential with constant dissipation is mildly consistent with data at N=60.
Quadratic and quartic potentials with variable dissipation fit Planck2018 data well.
Model parameters are constrained by observational datasets at 68% and 95% confidence levels.
Abstract
In this paper we construct a dissipative quintessential cosmic inflation. For this purpose, we add a multiplicative dissipative term in the standard quintessence field Lagrangian. We consider the specific form of dissipation as the time integral including the Hubble parameter and an arbitrary function that describes the dissipative properties of the quintessential scalar field. Inflation parameters and observables are calculated under slow-roll approximations and a detailed calculation of the cosmological perturbations is performed in this setup. We consider different forms of potentials and calculate the scalar spectral index and tensor-to-scalar ratio for a constant as well as variable dissipation function. To check the reliability of this model, a numerical analysis on the model parameters space is done in confrontation with recent observational data. By comparing the results with…
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Taxonomy
TopicsCosmology and Gravitation Theories · Solar and Space Plasma Dynamics · Geophysics and Gravity Measurements
