Observational Constraints on Monomial Warm Inflation

Abstract

Warm inflation is, as of today, one of the best motivated mechanisms for explaining an early inflationary period. In this paper, we derive and analyze the current bounds on warm inflation with a monomial potential $U\propto {\varphi }^p$, using the constraints from the PLANCK mission. In particular, we discuss the parameter space of the tensor-to-scalar ratio $r$ and the potential coupling $\lambda$ of the monomial warm inflation in terms of the number of e-folds. We obtain that the theoretical tensor-to-scalar ratio $r\sim 10^{-8}$ is much smaller than the current observational constrain $r\lesssim 0.12$, despite a relatively large value of the field excursion $Δϕ\sim 0.1\MP$. Warm inflation thus eludes the Lyth bound set on the tensor-to-scalar ratio by the field excursion.

21 pages, 4 figures

References in corpus (28)

• Planck 2013 results. XVI. Cosmological parameters
• Nine-Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Final Maps and Results
• A Joint Analysis of BICEP2/Keck Array and Planck Data
• Monodromy in the CMB: Gravity Waves and String Inflation
• Gravity Waves and Linear Inflation from Axion Monodromy
• Warm Inflation and its Microphysical Basis
• Reheating constraints to inflationary models
• The importance of being warm (during inflation)
• Dissipation coefficients from scalar and fermion quantum field interactions
• General dissipation coefficient in low-temperature warm inflation
• Power spectrum for inflation models with quantum and thermal noises
• Density fluctuations from warm inflation
• Non-gaussianity in fluctuations from warm inflation
• BICEP2 / Keck Array V: Measurements of B-mode Polarization at Degree Angular Scales and 150 GHz by the Keck Array
• Observable gravitational waves from inflation with small field excursions
• On the consistency of warm inflation
• Cosmological perturbations in warm inflationary models with viscous pressure
• Natural Warm Inflation
• Warm DBI Inflation
• Observational implications of mattergenesis during inflation
• Determining the regimes of cold and warm inflation in the susy hybrid model
• ${\varphi }^2$ or Not ${\varphi }^2$: Testing the Simplest Inflationary Potential
• Dynamics of Interacting Scalar Fields in Expanding Space-Time
• Particle physics models of inflation
• Cosmological perturbations for an inflaton field coupled to radiation
• Non-gaussianity in the strong regime of warm inflation
• Sneutrino warm inflation in the minimal supersymmetric model
• Aspects of warm-flat directions

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• Salvaging Power-Law Inflation through Warming
• Two-field Warm Inflation and Its Scalar Perturbations on Large Scales
• Warm inflation in general scalar-tensor theory of gravity
• Gravitational waves from two scalar fields unifying the dark sector with inflation
• Gravitational waves from warm inflation in the weak dissipative regime