Quantum cosmology from group field theory condensates: a review

S Gielen, L Sindoni - … Symmetry, Integrability and Geometry: Methods and …, 2016 - emis.de
We give, in some detail, a critical overview over recent work towards deriving a cosmological
phenomenology from the fundamental quantum dynamics of group field theory (GFT), based …

Coarse graining spin foam quantum gravity—a review

S Steinhaus - Frontiers in Physics, 2020 - frontiersin.org
In quantum gravity, we envision renormalization as the key tool for bridging the gap between
microscopic models and observable scales. For spin foam quantum gravity, which is defined …

Edge modes of gravity. Part II. Corner metric and Lorentz charges

L Freidel, M Geiller, D Pranzetti - Journal of High Energy Physics, 2020 - Springer
A bstract In this second paper of the series we continue to spell out a new program for
quantum gravity, grounded in the notion of corner symmetry algebra and its representations …

Quantum gravity in 30 questions

R Loll, G Fabiano, D Frattulillo, F Wagner - arXiv preprint arXiv …, 2022 - arxiv.org
Quantum gravity is the missing piece in our understanding of the fundamental interactions
today. Given recent observational breakthroughs in gravity, providing a quantum theory for …

Emergent Friedmann dynamics with a quantum bounce from quantum gravity condensates

D Oriti, L Sindoni, E Wilson-Ewing - Classical and Quantum …, 2016 - iopscience.iop.org
We study the effective cosmological dynamics, emerging as the hydrodynamics of simple
condensate states, of a group field theory (GFT) model for quantum gravity coupled to a …

Spin Foams, Refinement Limit, and Renormalization

SK Asante, B Dittrich, S Steinhaus - Handbook of Quantum Gravity, 2023 - Springer
Spin foams provide path integrals for quantum gravity, which employ discretizations as
regulator. To obtain regulator independent predictions, we must remove these fiducial …

Discrete gravity dynamics from effective spin foams

SK Asante, B Dittrich, HM Haggard - Classical and Quantum …, 2021 - iopscience.iop.org
The first computation of a spin foam dynamics that provides a test of the quantum equations
of motions of gravity is presented. Specifically, a triangulation that includes an inner edge is …

From spin foams to area metric dynamics to gravitons

B Dittrich, A Kogios - Classical and Quantum Gravity, 2023 - iopscience.iop.org
Although spin foams arose as quantizations of the length metric degrees of freedom, the
quantum configuration space is rather based on areas as more fundamental variables. This …

Gravitational edge modes: from Kac–Moody charges to Poincaré networks

L Freidel, E Livine, D Pranzetti - Classical and Quantum Gravity, 2019 - iopscience.iop.org
We revisit the canonical framework for general relativity in its connection-vierbein
formulation, recasting the Gauss law, the Bianchi identity and the space diffeomorphism bulk …

Loop gravity string

L Freidel, A Perez, D Pranzetti - Physical Review D, 2017 - APS
In this work we study canonical gravity in finite regions for which we introduce a
generalization of the Gibbons-Hawking boundary term including the Immirzi parameter. We …