Emergent de Sitter epoch of the quantum Cosmos

Abstract

The quantum nature of the Big Bang is reexamined in the framework of Loop Quantum Cosmology. The strict application of a regularization procedure to the Hamiltonian, originally developed for the Hamiltonian in loop quantum gravity, leads to a qualitative modification of the bounce paradigm. Quantum gravity effects still lead to a quantum bounce connecting deterministically large classical Universes. However, the evolution features a large epoch of de Sitter Universe, with emergent cosmological constant of Planckian order, smoothly transiting into a flat expanding Universe.

arXiv comment6 pages, 2 figures, revised version accepted for publication in Phys.Rev.Lett., with the addition of fig.2 and subsequent comments

References in corpus (13)

• Loop Quantum Cosmology: A Status Report
• Quantum Nature of the Big Bang: Improved dynamics
• Quantum Nature of the Big Bang
• Quantum Spin Dynamics (QSD)
• Planck 2015 results. XI. CMB power spectra, likelihoods, and robustness of parameters
• Quantization of diffeomorphism invariant theories of connections with local degrees of freedom
• Introduction to Modern Canonical Quantum General Relativity
• A Quantum Gravity Extension of the Inflationary Scenario
• Alternative quantization of the Hamiltonian in loop quantum cosmology II: Including the Lorentz term
• Positive cosmological constant in loop quantum cosmology
• New scalar constraint operator for loop quantum gravity
• Cosmological Coherent State Expectation Values in LQG I. Isotropic Kinematics
• A curvature operator for LQG

Cited by in corpus (65)

• A Short Review of Loop Quantum Gravity
• Quantum Oppenheimer-Snyder and Swiss Cheese models
• Cosmological Effective Hamiltonian from full Loop Quantum Gravity Dynamics
• Shadow and stability of quantum-corrected black holes
• Finite-time Cosmological Singularities and the Possible Fate of the Universe
• Qualitative dynamics and inflationary attractors in loop cosmology
• On the geometry of the black-to-white hole transition within a single asymptotic region
• Perspectives on the dynamics in a loop quantum gravity effective description of black hole interiors
• Emergent de Sitter epoch of the Loop Quantum Cosmos: a detailed analysis
• Genericness of pre-inflationary dynamics and probability of the desired slow-roll inflation in modified loop quantum cosmologies
• Primordial scalar power spectrum from the hybrid approach in loop cosmologies
• Phenomenological implications of modified loop cosmologies: an overview
• Generalised effective cosmology from group field theory
• States of Low Energy in bouncing inflationary scenarios in Loop Quantum Cosmology
• Generic absence of strong singularities and geodesic completeness in modified loop quantum cosmologies
• The Martin-Benito-Mena Marugan-Olmedo prescription for the Dapor-Liegener model of Loop Quantum Cosmology
• Von Neumann stability of modified loop quantum cosmologies
• Power spectrum of primordial perturbations for an emergent universe in quantum reduced loop gravity
• Understanding quantum black holes from quantum reduced loop gravity
• Quantum Gravity on the computer: Impressions of a workshop
• Loop quantum cosmology: relation between theory and observations
• Some physical implications of regularization ambiguities in SU(2) gauge-invariant loop quantum cosmology
• Primordial perturbations in the Dapor-Liegener model of hybrid loop quantum cosmology
• Loop quantum gravity and cosmological constant
• Big Bang Singularity Resolution In Quantum Cosmology
• Quantum gravity phenomenology at the dawn of the multi-messenger era -- A review
• Loop effective model for Schwarzschild black hole interior: a modified $\bar{\mu }$ dynamics
• Alternative dynamics in loop quantum Brans-Dicke cosmology
• Influence of Quantum Correction on Kerr Black Hole in Effective Loop Quantum Gravity via Shadows and EHT Results
• Quantum gravity might restrict a cyclic evolution
• Gauge-invariant bounce from loop quantum gravity
• Dapor-Liegener formalism of loop quantum cosmology for Bianchi I spacetimes
• Uniqueness of minimal loop quantum cosmology dynamics
• Modifications to Gravitational Wave Equation from Canonical Quantum Gravity
• The time-dependent mass of cosmological perturbations in loop quantum cosmology: Dapor-Liegener regularization
• Universal properties of the evolution of the Universe in modified loop quantum cosmology
• Loop quantum cosmology from an alternative Hamiltonian
• The volume operator in loop quantum cosmology
• Renormalisation with SU(1, 1) coherent states on the LQC Hilbert space
• Dynamics of k-essence in loop quantum cosmology
• Algorithmic approach to Cosmological Coherent State Expectation Values in LQG
• Energy conditions in new model of loop quantum cosmology
• Loop Quantum Cosmology: Physics of Singularity Resolution and its Implications
• Loop quantum cosmology from an alternative Hamiltonian. II. Including the Lorentzian term
• Loop quantum cosmological dynamics of scalar-tensor theory in the Jordan frame
• Dynamics in canonical models of loop quantum gravity
• Thermodynamics in new model of loop quantum cosmology
• Alternative $k=-1$ loop quantum cosmology
• Low-curvature quantum corrections from unitary evolution of de Sitter space
• Covariant effective spacetimes of spherically symmetric electrovacuum with a cosmological constant
• Loop quantum cosmology and its gauge-covariant avatar: a weak curvature relationship
• Quantum speed limit and stability of coherent states in quantum gravity
• Quantum Oppenheimer-Snyder models in loop quantum cosmology with Lorentz term
• Effective LQC model for k=+1 isotropic cosmologies from spatial discretisations
• Loop quantum cosmological model from ADM Hamiltonian
• Cosmic tango between the very small and the very large: Addressing CMB anomalies through Loop Quantum Cosmology
• Nonclassical cosmological dynamics in the low-energy limit of loop quantum scalar-tensor theory
• Stable initial conditions and analytical investigations of cosmological perturbations in a modified loop quantum cosmology
• Bouncing Bianchi Models with Deformed Commutation Relations
• On the Role of Fiducial Structures in Minisuperspace Reduction and Quantum Fluctuations in LQC
• Non singular M theory Universe in Loop Quantum Cosmology -- inspired Models
• The Effect of a positive cosmological constant on the bounce of Loop Quantum Cosmology
• 2+1 dimensional loop quantum cosmology of Bianchi I models
• Unitary evolution and cosmic acceleration in Loop Quantum Cosmology
• Quantisation ambiguities and the effective dynamics of scalar-tensor theories in loop quantum cosmology