Preventing eternality in phantom inflation

Abstract

We have investigated the necessary conditions that prevent phantom inflation from being eternal. Allowing additionally for a nonminimal coupling between the phantom field and gravity, we present the slow-climb requirements, perform an analysis of the fluctuations, and finally we extract the overall conditions that are necessary in order to prevent eternality. Furthermore, we verify our results by solving explicitly the cosmological equations in a simple example of an exponential potential, formulating the classical motion plus the stochastic effect of the fluctuations through Langevin equations. Our analysis shows that phantom inflation can be finite without the need of additional exotic mechanisms.

8 pages, V2 references added. V3 version published in Phys. Rev. D

References in corpus (21)

• Inflationary Cosmology
• Dark energy cosmology from higher-order, string-inspired gravity and its reconstruction
• Eternal inflation and its implications
• Inflation with Non-Minimal Coupling: Metric vs. Palatini Formulations
• Reconstructing the universe history, from inflation to acceleration, with phantom and canonical scalar fields
• Quintessence and phantom cosmology with non-minimal derivative coupling
• Unified dark energy thermodynamics: varying w and the -1-crossing
• Braneworld models with a non-minimally coupled phantom bulk field: a simple way to obtain the -1-crossing at late times
• Inflation by non-minimal coupling
• Non-minimal quintessence and phantom with nearly flat potentials
• Crossing the phantom divide in an interacting generalized Chaplygin gas
• Is Brane Inflation Eternal?
• A volume-weighted measure for eternal inflation
• Dynamical renormalization group methods in theory of eternal inflation
• Can universe exit from phantom inflation due to gravitational back reaction?
• Eternal Chaotic Inflation is Prohibited by Weak Gravity Conjecture
• Non-Minimal Inflation on the Warped DGP Brane
• "Phantom" Inflation in Warped Compactification
• Inflation with High Derivative Couplings
• Nonminimal Inflation and the Running Spectral Index
• Hawking-Moss Tunneling in Noncommutative Eternal Inflation

Cited by in corpus (29)

• Modified Gravity Theories on a Nutshell: Inflation, Bounce and Late-time Evolution
• $f(T)$ models with phantom divide line crossing
• Inflation in Entropic Cosmology: Primordial Perturbations and non-Gaussianities
• On the possibility of blue tensor spectrum within single field inflation
• Vacuum Fluctuations of a Scalar Field during Inflation: Quantum versus Stochastic Analysis
• Backreaction and Stochastic Effects in Single Field Inflation
• Entropic Force Scenarios and Eternal Inflation
• Gauge invariant cosmological perturbations for the nonminimally coupled inflaton field
• Hamilton-Jacobi formalism for inflation with non-minimal derivative coupling
• Reconstruction of a Nonminimal Coupling Theory with Scale-invariant Power Spectrum
• $\alpha$ attractors in Quintessential Inflation motivated by Supergravity
• Phantom Inflation in Little Rip
• Observational constraints on phantom power-law cosmology
• Lorentzian Quintessential Inflation
• Quintessential Inflation from Lorentzian Slow Roll
• Inflationary generalized Chaplygin gas and dark energy in the light of the Planck and BICEP2 experiments
• Phantom Inflation with A Steplike Potential
• Reconstruction of f(R) models with Scale-invariant Power Spectrum
• The Scale Factor Potential Approach to Inflation
• Dynamically Generated Inflationary Lambda-CDM
• Eternal inflation and the quantum birth of cosmic structure
• Non-Gaussianity with Lagrange Multiplier Field in the Curvaton Scenario
• Cosmological perturbations in transient phantom inflation scenarios
• Modified holographic Ricci dark energy coupled to interacting relativistic and non-relativistic dark matter in the nonflat universe
• Symmetry breaking, and the effect of matter density on neutrino oscillation
• Schwinger-Keldysh mechanism in extended quasi single field inflation
• Mathematical Issues in Eternal Inflation
• Stochastic Eternal Inflation in a Bianchi Type I Universe
• Inflation from a generalized exponential plateau: towards extra suppressed tensor-to-scalar ratios