[HTML][HTML] Quantum gravity phenomenology at the dawn of the multi-messenger era—A review
A Addazi, J Alvarez-Muniz, RA Batista… - Progress in Particle and …, 2022 - Elsevier
The exploration of the universe has recently entered a new era thanks to the multi-
messenger paradigm, characterized by a continuous increase in the quantity and quality of …
messenger paradigm, characterized by a continuous increase in the quantity and quality of …
[HTML][HTML] Critical evaluation of common claims in loop quantum cosmology
M Bojowald - Universe, 2020 - mdpi.com
A large number of models have been analyzed in loop quantum cosmology, using mainly
minisuperspace constructions and perturbations. At the same time, general physics …
minisuperspace constructions and perturbations. At the same time, general physics …
Effective dynamics of scalar cosmological perturbations from quantum gravity
L Marchetti, D Oriti - Journal of Cosmology and Astroparticle …, 2022 - iopscience.iop.org
We derive an effective dynamics for scalar cosmological perturbations from quantum gravity,
in the framework of group field theory condensate cosmology. The emergent spacetime …
in the framework of group field theory condensate cosmology. The emergent spacetime …
Phantom-like dark energy from quantum gravity
D Oriti, X Pang - Journal of Cosmology and Astroparticle Physics, 2021 - iopscience.iop.org
We analyse the emergent cosmological dynamics corresponding to the mean field
hydrodynamics of quantum gravity condensates, in the group field theory formalism. We …
hydrodynamics of quantum gravity condensates, in the group field theory formalism. We …
Effective relational cosmological dynamics from quantum gravity
L Marchetti, D Oriti - Journal of High Energy Physics, 2021 - Springer
A bstract We discuss the relational strategy to solve the problem of time in quantum gravity
and different ways in which it could be implemented, pointing out in particular the …
and different ways in which it could be implemented, pointing out in particular the …
Towards anisotropic cosmology in group field theory
A Calcinari, S Gielen - Classical and Quantum Gravity, 2023 - iopscience.iop.org
In cosmological group field theory (GFT) models for quantum gravity coupled to a massless
scalar field the total volume, seen as a function of the scalar field, follows the classical …
scalar field the total volume, seen as a function of the scalar field, follows the classical …
[HTML][HTML] Quantum fluctuations in the effective relational GFT cosmology
L Marchetti, D Oriti - Frontiers in Astronomy and Space Sciences, 2021 - frontiersin.org
We analyze the size and evolution of quantum fluctuations of cosmologically relevant
geometric observables, in the context of the effective relational cosmological dynamics of …
geometric observables, in the context of the effective relational cosmological dynamics of …
Phase transitions in tensorial group field theories: Landau-Ginzburg analysis of models with both local and non-local degrees of freedom
L Marchetti, D Oriti, AGA Pithis, J Thürigen - Journal of High Energy …, 2021 - Springer
A bstract In the tensorial group field theory approach to quantum gravity, the theory is based
on discrete building blocks and continuum spacetime is expected to emerge from their …
on discrete building blocks and continuum spacetime is expected to emerge from their …
Scalar cosmological perturbations from quantum entanglement within Lorentzian quantum gravity
AF Jercher, L Marchetti, AGA Pithis - Physical Review D, 2024 - APS
We derive the dynamics of (isotropic) scalar perturbations from the mean-field
hydrodynamics of full Lorentzian quantum gravity, as described by a two-sector (timelike and …
hydrodynamics of full Lorentzian quantum gravity, as described by a two-sector (timelike and …
Frozen formalism and canonical quantization in group field theory
S Gielen - Physical Review D, 2021 - APS
Canonical quantization of gravitational systems is obstructed by the problem of time. Due to
diffeomorphism symmetry the Hamiltonian vanishes: dynamics with respect to a background …
diffeomorphism symmetry the Hamiltonian vanishes: dynamics with respect to a background …