Distinguishing cosmological models through quantum signatures of primordial perturbations

Abstract

We study the evolution of various measures of quantumness of the curvature perturbation by integrating out the inaccessible entropic fluctuations in the multi-field models of inflation. In particular, we discuss the following measures of quantumness, namely purity, entanglement entropy and quantum discord. The models being considered in this work are ones that produce large scale curvature power spectra similar to those produced by single-field models of inflation. More specifically, we consider different multi-field models which generate nearly scale invariant and oscillatory curvature power spectrum and compare their quantum signatures in the perturbations with the corresponding single-field models. We find that, even though different models of inflation may produce the same observable power spectrum on large scales, they have distinct quantum signatures arising from the perturbation modes. This may allow for a way to distinguish between different models of inflation based on their quantum signatures. Intriguingly, this result generalizes to bouncing scenarios as well.

arXiv comment20 pages, 7 figures

References in corpus (50)

• Quantum entanglement
• The Ekpyrotic Universe: Colliding Branes and the Origin of the Hot Big Bang
• Quantum discord and the power of one qubit
• Continuous variable quantum information: Gaussian states and beyond
• Entanglement in continuous variable systems: Recent advances and current perspectives
• Semiclassicality and Decoherence of Cosmological Perturbations
• Features of heavy physics in the CMB power spectrum
• Inflation and squeezed quantum states
• Non-Gaussian Quantum States and Where to Find Them
• Symplectic invariants, entropic measures and correlations of Gaussian states
• Quantum-to-classical transition for fluctuations in the early Universe
• Density Perturbations in the Ekpyrotic Scenario
• Generating Ekpyrotic Curvature Perturbations Before the Big Bang
• Curvature and isocurvature perturbations in two-field inflation
• Generating PBHs and small-scale GWs in two-field models of inflation
• Seeding primordial black holes in multifield inflation
• Purity of Gaussian states: measurement schemes and time-evolution in noisy channels
• Pointer states for primordial fluctuations in inflationary cosmology
• Quantum Discord of Cosmic Inflation: Can we Show that CMB Anisotropies are of Quantum-Mechanical Origin?
• Cosmological Inflation and the Quantum Measurement Problem
• Supergravity based inflation models: a review
• Geometrical Destabilization of Inflation
• A model with cosmological Bell inequalities
• Inflationary Perturbations: the Cosmological Schwinger Effect
• Inflationary Cosmological Perturbations of Quantum-Mechanical Origin
• Quantum Decoherence During Inflation from Gravitational Nonlinearities
• Standard Clock in Primordial Density Perturbations and Cosmic Microwave Background
• Emergence of classicality for primordial fluctuations: Concepts and analogies
• Note on the production of scale-invariant entropy perturbation in the Ekpyrotic universe
• Minimal decoherence from inflation
• A general mechanism for producing scale-invariant perturbations and small non-Gaussianity in ekpyrotic models
• Discord and Decoherence
• Decoherence from Isocurvature Perturbations in Inflation
• Generating primordial features at large scales in two field models of inflation
• On the Quantum-To-Classical Transition for Ekpyrotic Perturbations
• The Quantum Information of Cosmological Correlations
• Multifield inflation beyond $N_{\mathrm{field}}=2$: non-Gaussianities and single-field effective theory
• Quantum recoherence in the early universe
• Real-space entanglement in the Cosmic Microwave Background
• Converting entropy to curvature perturbations after a cosmic bounce
• Quantum non-linear evolution of inflationary tensor perturbations
• Enhanced power on small scales and evolution of quantum state of perturbations in single and two field inflationary models
• The Quantum State of Inflationary Perturbations
• Entanglement of Harmonic Systems in Squeezed States
• Primordial features from ekpyrotic bounces
• Entanglement and Expansion
• Testing supersymmetric Higgs inflation with non-Gaussianity
• No-boundary Wave Function, Wheeler-DeWitt Equation and Path Integral Analysis of the Bouncing `Quantum' Cosmology
• Towards general patterns of features in multi-field inflation
• Cosmological perturbations from multi-field inflation

Cited by in corpus (4)

• Decoherence out of fire: Purity loss in expanding and contracting universes
• The effect of quantum decoherence on inflationary gravitational waves
• Expansion-contraction duality breaking in a Planck-scale sensitive cosmological quantum simulator
• Mimicking two field inflationary features with a single field