Classicality of the primordial perturbations

Abstract

We show that during inflation, a quantum fluctuation becomes classical at all orders if it becomes classical at first order. Implications are discussed.

4 pages, uses RevTeX4 LaTeX document class. v2: More details of the classicality argument, and an improved discussion of its implications. v3: matches version published in PLB

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Cited by in corpus (37)

• One-loop corrections to the curvature perturbation from inflation
• Symmetries and Loops in Inflation
• Statistical anisotropy of the curvature perturbation from vector field perturbations
• Inflationary Cosmology as a Probe of Primordial Quantum Mechanics
• On the Issue of the ζSeries Convergence and Loop Corrections in the Generation of Observable Primordial Non-Gaussianity in Slow-Roll Inflation. Part I: the Bispectrum
• Gauge-field production during axion inflation in the gradient expansion formalism
• Backreaction of electromagnetic fields and the Schwinger effect in pseudoscalar inflation magnetogenesis
• A parton picture of de Sitter space during slow-roll inflation
• Preheating and the non-gaussianity of the curvature perturbation
• Inflationary perturbation theory is geometrical optics in phase space
• Influence of backreaction of electric fields and Schwinger effect on inflationary magnetogenesis
• Scale Dependent Local Non-Gaussianity from Loops
• Inflationary signatures of single-field models beyond slow-roll
• Transport equations for the inflationary spectral index
• Decoherence in an Interacting Quantum Field Theory: The Vacuum Case
• Trans-Planckian Censorship Conjecture and Non-thermal post-inflationary history
• Transport equations for the inflationary trispectrum
• The effects of a fast-turning trajectory in multiple-field inflation
• The Primordial Curvature Perturbation from Vector Fields of General non-Abelian Groups
• Feynman-like Rules for Calculating n-Point Correlators of the Primordial Curvature Perturbation
• Magnetogenesis and the primordial non-gaussianity
• Evolution of quantum field, particle content and classicality in the three stage universe
• Quantifying the behaviour of curvature perturbations during inflation
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• Non-Gaussianity from false vacuum inflation: Old curvaton scenario
• Chirality production during axion inflation
• Decoherence in an Interacting Quantum Field Theory: Thermal Case
• Cosmological Particle Creation Beyond de Sitter
• The generalized second law of thermodynamics and cosmological decoherence
• Resolution to the firewall paradox: The black hole information paradox and highly squeezed interior quantum fluctuations
• The spatial gauge-dependence of single-field inflationary bispectra
• Quantitative classicality in cosmological interactions during inflation
• Non-gaussianity and Statistical Anisotropy in Cosmological Inflationary Models
• Primordial Gravitational Waves in Quadratic Gravity
• Remote Hawking-Moss instanton and the Lorentzian path integral
• A (semi)-exact Hamiltonian for the curvature perturbation $\zeta$
• Infrared Logarithms in Minisuperspace Inflation