Cosmic microwave background and large-scale structure constraints on a simple quintessential inflation model

Abstract

We derive constraints on a simple quintessential inflation model, based on a spontaneously broken Phi^4 theory, imposed by the Wilkinson Microwave Anisotropy Probe three-year data (WMAP3) and by galaxy clustering results from the Sloan Digital Sky Survey(SDSS). We find that the scale of symmetry breaking must be larger than about 3 Planck masses in order for inflation to generate acceptable values of the scalar spectral index and of the tensor-to-scalar ratio. We also show that the resulting quintessence equation-of-state can evolve rapidly at recent times and hence can potentially be distinguished from a simple cosmological constant in this parameter regime.

5 pages, 2 figures

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• Non-minimal gravitational reheating during kination
• Palatini $R^2$ Quintessential Inflation
• Scalar field dark energy models: Current and forecast constraints
• Unified early and late Universe cosmology through dissipative effects in steep quintessential inflation potential models
• Warm Little Inflaton becomes Dark Energy
• $\beta$-exponential inflation
• What is needed of a scalar field if it is to unify inflation and late time acceleration ?
• Generalizing thawing dark energy models: the standard vis-à-vis model independent diagnostics
• Constraining the quintessential $\alpha$-attractor inflation through dynamical horizon exit method
• CMB and LSS constraints on a single-field model of inflation
• Radiative Inflation and Dark Energy