Late-time backreaction from inflationary fluctuations of a non-minimally coupled massless scalar

Abstract

We consider the late time one-loop quantum backreaction from inflationary fluctuations of a non-minimally coupled, massless scalar field. The scalar is assumed to be a spectator field in an inflationary model with a constant principal slow roll $\epsilon$ parameter. We regulate the infrared by matching onto a pre-inflationary radiation era. We find a large late time backreaction when the nonminimal coupling $\xi$ is negative (in which case the scalar exhibits a negative mass term during inflation). The one-loop quantum backreaction becomes significant today for moderately small non-minimal couplings, $\xi \sim -1/20$, and it changes sign (from negative to positive) at a recent epoch when inflation lasts not much longer than what is minimally required, $N\gtrsim 66$. Since currently we do not have a way of treating the classical fluid and the quantum backreaction in a self-consistent manner, we cannot say decidely whether the backreaction from inflationary quantum fluctuations of a non-minimally coupled scalar can mimic dark energy.

arXiv comment45 pages, 5 figures, uses RevTeX4.1

References in corpus (41)

• Planck 2013 results. I. Overview of products and scientific results
• BICEP2 I: Detection Of B-mode Polarization at Degree Angular Scales
• Equilibrium State of a Massless Self-Interacting Scalar Field in the De Sitter Background
• The Quantum Gravitational Back-Reaction On Inflation
• Quantum Gravity Slows Inflation
• On cosmic acceleration without dark energy
• Stochastic Inflationary Scalar Electrodynamics
• Back Reaction And Local Cosmological Expansion Rate
• Leading Log Solution for Inflationary Yukawa
• Photon mass from inflation
• One Loop Vaccum Polarization in a Locally de Sitter Background
• The Effect of Inhomogeneities on the Luminosity Distance-Redshift Relation: is Dark Energy Necessary in a Perturbed Universe?
• Can superhorizon cosmological perturbations explain the acceleration of the universe?
• Back Reaction Of Perturbations In Two Scalar Field Inflationary Models
• Effective potential for quantum scalar fields on a de Sitter geometry
• Two loop stress-energy tensor for inflationary scalar electrodynamics
• No One Loop Back_Reaction In Chaotic Inflation
• Two Loop Scalar Bilinears for Inflationary SQED
• Renormalization group flow and symmetry restoration in de Sitter space
• A Completely Regular Quantum Stress Tensor with $w<-1$
• A Scalar Measure Of The Local Expansion Rate
• One Loop Back Reaction On Chaotic Inflation
• One Loop Back Reaction On Power Law Inflation
• Dark energy from primordial inflationary quantum fluctuations
• Back-Reaction Is For Real
• Backreaction of a massless minimally coupled scalar field from inflationary quantum fluctuations
• Cosmological Backreaction for a Test Field Observer in a Chaotic Inflationary Model
• Ultraviolet Divergences in Cosmological Correlations
• The Hubble Effective Potential
• A graviton propagator for inflation
• Quantum backreaction in evolving FLRW spacetimes
• Symmetry breaking and the Goldstone theorem in de Sitter space
• Plane waves in a general Robertson-Walker background
• Isotropic Observers and the Inflationary Backreaction Problem
• Regulating the infrared by mode matching: A massless scalar in expanding spaces with constant deceleration
• Vacuum energy as dark matter
• Evolution of vacuum fluctuations generated during and before inflation
• Effect of the Trace Anomaly on the Cosmological Constant
• The graviton one-loop effective action in cosmological space-times with constant deceleration
• Gauge invariant backreaction in general single field models of inflation
• Symmetry breaking in de Sitter: a stochastic effective theory approach

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• Evolution of Vacuum Fluctuations of an Ultra-Light Massive Scalar Field generated during and before Inflation
• Inflation from cosmological constant and nonminimally coupled scalar
• When tadpoles matter: One-loop corrections for spectator Higgs in inflation
• Abelian Higgs model in power-law inflation: the propagators in the unitary gauge
• Large-scale inhomogeneity of dark energy produced in the ancestor vacuum
• Elucidating Dark Energy with Future 21 cm Observations at the Epoch of Reionization
• Vacuum fluctuations in an ancestor vacuum: A possible dark energy candidate
• Second-order effective energy-momentum tensor of gravitational scalar perturbations with perfect fluid
• Fluctuating Dark Energy and the Luminosity Distance
• Spatial correlations of dark energy from quantum fluctuations in inflation
• Stochastic Dynamics of Infrared Fluctuations in Accelerating Universe
• On primordial black holes from an inflection point
• Dark energy model with very large-scale inhomogeneity
• Nonminimal coupling and the cosmological constant problem
• Appearances are deceptive: Can graviton have a mass?
• Uniqueness of gravitational constant at low energies from the connection between spin-2 and spin-0 sectors