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Loop Quantum Gravity [PDF]

open access: yesLiving Reviews in Relativity, 2008
The problem of describing the quantum behavior of gravity, and thus understanding quantum spacetime, is still open. Loop quantum gravity is a well-developed approach to this problem. It is a mathematically well-defined background-independent quantization
Rovelli Carlo
doaj   +11 more sources

Black-Hole Models in Loop Quantum Gravity [PDF]

open access: yesUniverse, 2020
Dynamical black-hole scenarios have been developed in loop quantum gravity in various ways, combining results from mini and midisuperspace models. In the past, the underlying geometry of space-time has often been expressed in terms of line elements with ...
Martin Bojowald
doaj   +2 more sources

Black hole singularity resolution via the modified Raychaudhuri equation in loop quantum gravity [PDF]

open access: greenPhysical Review D, 2021
We derive Loop Quantum Gravity corrections to the Raychaudhuri equation in the interior of a Schwarzschild black hole and near the classical singularity.
Keagan Blanchette   +3 more
openalex   +3 more sources

Polytopes in all dimensional loop quantum gravity [PDF]

open access: yesEuropean Physical Journal C: Particles and Fields, 2022
The Lasserre’s reconstruction algorithm is extended to the D-polytopes with the construction of their shape space. Thus, the areas of d-skeletons $$(1\le d\le D)$$ ( 1 ≤ d ≤ D ) can be expressed as functions of the areas and normal bi-vectors of the (D-1)
Gaoping Long, Yongge Ma
doaj   +2 more sources

(b,v)-type variables for black to white hole transitions in effective loop quantum gravity [PDF]

open access: yesPhysics Letters B, 2021
Quantum gravity effects in effective models of loop quantum gravity, such as loop quantum cosmology, are encoded in the choice of so-called polymerisation schemes.
Norbert Bodendorfer   +2 more
doaj   +2 more sources

Loop Quantum Gravity

open access: greenLiving Reviews in Relativity, 1998
The problem of finding the quantum theory of the gravitational field, and thus understanding what is quantum spacetime, is still open. One of the most active of the current approaches is loop quantum gravity. Loop quantum gravity is a mathematically well-
Rovelli Carlo
doaj   +1 more source

Space and Time in Loop Quantum Gravity [PDF]

open access: greenBeyond Spacetime, 2018
Quantum gravity is expected to require modifications of the notions of space and time. I discuss and clarify how this happens in Loop Quantum Gravity. (Contribution to the volume "Beyond Spacetime: The Philosophical Foundations of Quantum Gravity" edited
Carlo Rovelli
openalex   +2 more sources

A Status Report on the Phenomenology of Black Holes in Loop Quantum Gravity: Evaporation, Tunneling to White Holes, Dark Matter and Gravitational Waves [PDF]

open access: yesUniverse, 2018
The understanding of black holes in loop quantum gravity is becoming increasingly accurate. This review focuses on the possible experimental or observational consequences of the underlying spinfoam structure of space-time.
Aurélien Barrau   +2 more
doaj   +2 more sources

Shadows of loop quantum black holes: semi-analytical simulations of loop quantum gravity effects on Sagittarius A* and M87* [PDF]

open access: yesJournal of Cosmology and Astroparticle Physics, 2023
In this study, we delve into the observational implications of rotating Loop Quantum Black Holes (LQBHs) within an astrophysical framework. We employ semi-analytical General Relativistic Radiative Transfer (GRRT) computations to study the emission from ...
Hong-Xuan Jiang   +6 more
semanticscholar   +1 more source

Peculiar properties in quasinormal spectra from loop quantum gravity effect [PDF]

open access: yesPhysical Review D, 2023
We investigate the quasi-normal mode (QNM) spectra for scalar and electromagnetic fields over a covairant loop quantum gravity black hole (LQG-BH). For the fundamental modes, the LQG effect reduces the oscillations in the scalar field, however it induces
Guoyang Fu   +4 more
semanticscholar   +1 more source

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