Phantom Inflation with A Steplike Potential

Abstract

The phantom inflation predicts a slightly blue spectrum of tensor perturbation, which might be tested in coming observations. In normal inflation models, the introduction of step in its potential generally results in an oscillation in the primordial power spectrum of curvature perturbation. We will check whether there is a similar case in the phantom inflation with steplike potential. We find that for same potentials, the oscillation of the spectrum of phantom inflation is nearly same with that of normal inflation, the difference between them is the tilt of power spectrum.

6 pages, 6 figures, minimal changed, to be published in PLB

References in corpus (12)

• Reconstructing the universe history, from inflation to acceleration, with phantom and canonical scalar fields
• New Universal Local Feature in the Inflationary Perturbation Spectrum
• New Constraints on Oscillations in the Primordial Spectrum of Inflationary Perturbations
• Primordial features due to a step in the inflaton potential
• Evolution of Metric Perturbations in Quintom Bounce model
• Is a step in the primordial spectral index favored by CMB data ?
• Preventing eternality in phantom inflation
• Can universe exit from phantom inflation due to gravitational back reaction?
• "Phantom" Inflation in Warped Compactification
• Are we seeing the beginnings of Inflation?
• Emergently Thermalized Islands in the Landscape
• Non-Gaussianity in Island Cosmology

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• $k$-essence $f(R)$ Gravity Inflation
• Single field inflation in the light of Pulsar Timing Array Data: Quintessential interpretation of blue tilted tensor spectrum through Non-Bunch Davies initial condition
• Broken blue-tilted inflationary gravitational waves: a joint analysis of NANOGrav 15-year and BICEP/Keck 2018 data
• Reconstruction of a Nonminimal Coupling Theory with Scale-invariant Power Spectrum
• Phantom Inflation in Little Rip
• A Multiple Step-like Spectrum of Primordial Perturbation
• Radion induced inflation on non-flat brane and modulus stabilization
• Perturbations of bounce inflation scenario from $f(T)$ modified gravity revisited
• Reconstruction of f(R) models with Scale-invariant Power Spectrum
• Spectral Distortion Signatures of Step-like Inflationary Potential
• Reconstructing inflationary potential from NANOGrav 15-year Data: A robust study using Non-Bunch Davies initial condition
• Confronting phantom inflation with Planck data