The spin-foam approach to quantum gravity

A Perez - Living Reviews in Relativity, 2013 - Springer
This article reviews the present status of the spin-foam approach to the quantization of
gravity. Special attention is payed to the pedagogical presentation of the recently-introduced …

Loop quantum gravity: the first 25 years

C Rovelli - Classical and Quantum Gravity, 2011 - iopscience.iop.org
I give a synthetic presentation of loop quantum gravity. I present the aims of the theory and
compare the results obtained with the initial hopes that motivated the early interest in this …

Zakopane lectures on loop gravity

C Rovelli - arxiv preprint arxiv:1102.3660, 2011 - arxiv.org
arxiv:1102.3660v5 [gr-qc] 3 Aug 2011 Page 1 Zakopane lectures on loop gravity Carlo Rovelli
Centre de Physique Théorique de Luminy, Case 907, F-13288 Marseille, EU (Dated: August 4 …

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 …

Complete Barrett-Crane model and its causal structure

AF Jercher, D Oriti, AGA Pithis - Physical Review D, 2022 - APS
The causal structure is a quintessential element of continuum spacetime physics and needs
to be properly encoded in a theory of Lorentzian quantum gravity. Established spin foam …

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 …

Asymptotics of spinfoam amplitude on simplicial manifold: Lorentzian theory

M Han, M Zhang - Classical and Quantum Gravity, 2013 - iopscience.iop.org
This paper studies the large-j asymptotics of the Lorentzian Engle–Pereira–Rovelli–Livine
(EPRL) spinfoam amplitude on a 4D simplicial complex with an arbitrary number of …

Group field theory for quantum gravity minimally coupled to a scalar field

Y Li, D Oriti, M Zhang - Classical and Quantum Gravity, 2017 - iopscience.iop.org
We construct a group field theory model for quantum gravity minimally coupled to relativistic
scalar fields, defining as well a corresponding discrete gravity path integral (and, implicitly, a …

Dirac equation as a quantum walk over the honeycomb and triangular lattices

P Arrighi, G Di Molfetta, I Márquez-Martín, A Pérez - Physical Review A, 2018 - APS
A discrete-time quantum walk (QW) is essentially an operator driving the evolution of a
single particle on the lattice, through local unitaries. Some QWs admit a continuum limit …

From general relativity to quantum gravity

A Ashtekar, M Reuter, C Rovelli - arxiv preprint arxiv:1408.4336, 2014 - arxiv.org
In general relativity (GR), spacetime geometry is no longer just a background arena but a
physical and dynamical entity with its own degrees of freedom. We present an overview of …