Observational issues in loop quantum cosmology

Abstract

Quantum gravity is sometimes considered as a kind of metaphysical speculation. In this review, we show that, although still extremely difficult to reach, observational signatures can in fact be expected. The early universe is an invaluable laboratory to probe "Planck scale physics". Focusing on Loop Quantum Gravity as one of the best candidate for a non-perturbative and background-independant quantization of gravity, we detail some expected features.

75 pages, invited topical review for Classical and Quantum Gravity

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Cited by in corpus (72)

• A Critical Review of Classical Bouncing Cosmologies
• A Short Review of Loop Quantum Gravity
• Quantum cosmology: a review
• Loop quantum cosmology: From pre-inflationary dynamics to observations
• Numerical simulations of a loop quantum cosmos: robustness of the quantum bounce and the validity of effective dynamics
• Detailed analysis of the predictions of loop quantum cosmology for the primordial power spectra
• Finite-time Cosmological Singularities and the Possible Fate of the Universe
• Critical evaluation of common claims in loop quantum cosmology
• Anomaly-free cosmological perturbations in effective canonical quantum gravity
• Anomaly-free perturbations with inverse-volume and holonomy corrections in Loop Quantum Cosmology
• Quantum Gravity in the Sky: Interplay between fundamental theory and observations
• Alleviating the Tension in the Cosmic Microwave Background using Planck-Scale Physics
• Loop quantum cosmology, non-Gaussianity, and CMB power asymmetry
• Testing loop quantum cosmology
• Phenomenological investigation of a quantum gravity extension of inflation with the Starobinsky potential
• Comparison of primordial tensor power spectra from the deformed algebra and dressed metric approaches in loop quantum cosmology
• Hypersurface-deformation algebroids and effective space-time models
• Canonical transformations and squeezing formalism in cosmology
• Primordial scalar power spectrum from the Euclidean Big Bounce
• Observational Exclusion of a Consistent Quantum Cosmology Scenario
• Covariance in models of loop quantum gravity: Gowdy systems
• Inflation with the Starobinsky potential in Loop Quantum Cosmology
• Detailed investigation of the duration of inflation in loop quantum cosmology for a Bianchi-I universe with different inflaton potentials and initial conditions
• Primordial power spectrum from the Dapor-Liegener model of loop quantum cosmology
• Non-Gaussianity in Loop Quantum Cosmology
• Spherically symmetric sector of self dual Ashtekar gravity coupled to matter: Anomaly-free algebra of constraints with holonomy corrections
• Phenomenology with fluctuating quantum geometries in loop quantum cosmology
• Observations in Quantum Cosmology
• Gravitational quantum effects on power spectra and spectral indices with higher-order corrections
• Hamiltonian formalism for cosmological perturbations: the separate-universe approach
• Probability of Warm Inflation in Loop Quantum Cosmology
• Scalar and tensor perturbations in loop quantum cosmology: High-order corrections
• Detecting quantum gravitational effects of loop quantum cosmology in the early universe?
• Inflationary spectra with inverse-volume corrections in loop quantum cosmology and their observational constraints from Planck 2015 data
• The perturbed universe in the deformed algebra approach of Loop Quantum Cosmology
• Decoherence out of fire: Purity loss in expanding and contracting universes
• Joint Planck and WMAP Assessment of Low CMB Multipoles
• Exhaustive investigation of the duration of inflation in effective anisotropic loop quantum cosmology
• Observational Constraints on Warm Inflation in Loop Quantum Cosmology
• Hint of a truncated primordial spectrum from the CMB large-scale anomalies
• Uniqueness of the Representation in Homogeneous Isotropic LQC
• How can holonomy corrections be introduced in $f(R)$ gravity?
• Anomaly free cosmological perturbations with generalised holonomy correction in loop quantum cosmology
• Quantum fields in the background spacetime of a loop quantum gravity black hole
• Warm bounce in loop quantum cosmology and the prediction for the duration of inflation
• Complete Hamiltonian analysis of cosmological perturbations at all orders
• Symmetry Reduced Loop Quantum Gravity: A Bird's Eye View
• Constraining the Barbero-Immirzi parameter from the duration of inflation in loop quantum cosmology
• Our Universe from the cosmological constant
• Seeing through the cosmological bounce: Footprints of the contracting phase and luminosity distance in bouncing models
• Introduction to Hamiltonian Formulation of General Relativity and Homogeneous Cosmologies
• Low-$\ell$ power suppression in punctuated inflation
• Gravitational Particle Production in Loop Quantum Cosmology
• Explaining low l anomalies in the CMB power spectrum with resonant superstring excitations during inflation
• Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review
• Possible Evidence for Planck-Scale Resonant Particle Production during Inflation from the CMB Power Spectrum
• Black Hole Shadows Constrain Extended Gravity
• Cosmological implications of generalized holonomy corrections
• An Inhomogeneous Space-Time Patching Model Based on a Nonlocal and Nonlinear Schrodinger Equation
• Gravitational Particle Production and the Validity of Effective Descriptions in Loop Quantum Cosmology
• Impact of generalized holonomy corrections on the cosmological primordial power spectra
• Phenomenology analysis of duration inflation for Tachyon field in loop quantum cosmology
• Hamiltonian formalism for cosmological perturbations: fixing the gauge
• $\alpha$-attractor potentials in loop quantum cosmology
• Classical versus quantum evolution for a universe with a positive cosmological constant
• (Loop) quantum gravity and the inflationary scenario
• Slow-roll approximation in loop quantum cosmology
• Cosmological states in loop quantum gravity on homogeneous graphs
• Cosmic tango between the very small and the very large: Addressing CMB anomalies through Loop Quantum Cosmology
• Regularization of the cosmological sector of loop quantum gravity with bosonic matter and the related problems with general covariance of quantum corrections
• A class of entangled and diffeomorphism-invariant states in loop quantum gravity: Bell-network states
• Loop quantum inflation with inverse volume corrections in light of ACT data