Results 41 to 50 of about 640,772 (343)
Black Hole Evaporation: A Perspective from Loop Quantum Gravity [PDF]
Universe, 2020 A personal perspective on the black hole evaporation process is presented using, as guidelines, inputs from: (i) loop quantum gravity, (ii) simplified models where concrete results have been obtained, and, (iii) semi-classical quantum general relativity.
A. Ashtekar
semanticscholar +1 more source
Let Loop Quantum Gravity and Affine Quantum Gravity Examine Each Other [PDF]
Journal of High Energy Physics, Gravitation and Cosmology > Vol.7
No.3, July 2021, 2021 Loop Quantum Gravity is widely developed using canonical quantization in an effort to find the correct quantization for gravity. Affine quantization, which is like canonical quantization augmented bounded in one orientation, e.g., a strictly positive coordinate. We open discussion using canonical and affine quantizations for two simple problems so each
arxiv +1 more source
Testing Loop Quantum Gravity from Observational Consequences of Nonsingular Rotating Black Holes. [PDF]
Physical Review Letters, 2020 The lack of rotating black hole models, which are typically found in nature, in loop quantum gravity (LQG) substantially hinders the progress of testing LQG from observations.
Suddhasattwa Brahma +2 more
semanticscholar +1 more source
Perturbatively exact w 1+∞ asymptotic symmetry of quantum self-dual gravity
Journal of High Energy Physics, 2022 The infinite tower of positive-helicity soft gravitons in any minimally coupled, tree-level, asymptotically flat four-dimensional (4D) gravity was recently shown to generate a w 1+∞ asymptotic symmetry algebra. It is natural to ask whether this classical
Adam Ball +3 more
doaj +1 more source
Does the Loop Quantum μo Scheme Permit Black Hole Formation?
Universe, 2021 We explore the way different loop quantization prescriptions affect the formation of trapped surfaces in the gravitational collapse of a homogeneous dust cloud, with particular emphasis on the so-called μo scheme in which loop quantum cosmology was ...
Bao-Fei Li, Parampreet Singh
doaj +1 more source
Improved effective dynamics of loop-quantum-gravity black hole and Nariai limit [PDF]
Classical and quantum gravity, 2020 We propose a new model of the spherical symmetric quantum black hole in the reduced phase space formulation. We deparametrize gravity by coupling to the Gaussian dust which provides the material coordinates.
Muxin Han, Hongguang Liu
semanticscholar +1 more source
Critical Collapse of a Scalar Field in Semiclassical Loop Quantum Gravity. [PDF]
Physical Review Letters, 2020 We study the collapse in spherical symmetry of a massless scalar field minimally coupled to gravity using the semiclassical equations that are expected from loop quantum gravity.
F. Benítez +4 more
semanticscholar +1 more source
Loop Quantum Black Hole Extensions Within the Improved Dynamics
Frontiers in Astronomy and Space Sciences, 2021 We continue our investigation of an improved quantization scheme for spherically symmetric loop quantum gravity. We find that in the region where the black hole singularity appears in the classical theory, the quantum theory contains semi-classical ...
Rodolfo Gambini +2 more
doaj +1 more source
Entropy of black holes with arbitrary shapes in loop quantum gravity [PDF]
Science China Physics Mechanics and Astronomy, 2020 The quasi-local notion of an isolated horizon is employed to study the entropy of black holes without any particular symmetry in loop quantum gravity. The idea of characterizing the shape of a horizon by a sequence of local areas is successfully applied ...
Shupeng Song +3 more
semanticscholar +1 more source
General geometric operators in all dimensional loop quantum gravity [PDF]
Physical Review D, 2020 Two strategies for constructing general geometric operators in all dimensional loop quantum gravity are proposed. The different constructions mainly come from the two different regularization methods for the basic building blocks of the spatial geometry.
Gaoping Long, Yongge Ma
semanticscholar +1 more source