Results 1 to 10 of about 1,820 (98)

Perturbatively exact w 1+∞ asymptotic symmetry of quantum self-dual gravity

open access: yesJournal 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?

open access: yesUniverse, 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

Loop Quantum Black Hole Extensions Within the Improved Dynamics

open access: yesFrontiers 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

A Covariant Polymerized Scalar Field in Semi-Classical Loop Quantum Gravity

open access: yesUniverse, 2022
We propose a new polymerization scheme for scalar fields coupled to gravity. It has the advantage of being a (non-bijective) canonical transformation of the fields, and therefore ensures the covariance of the theory.
Rodolfo Gambini   +2 more
doaj   +1 more source

On Propagation in Loop Quantum Gravity

open access: yesUniverse, 2022
A rigorous implementation of the Wheeler–Dewitt equations was derived in the context of Loop Quantum Gravity (LQG) and was coined Quantum Spin Dynamics (QSD). The Hamiltonian constraint of QSD was criticised as being too local and to prevent “propagation”
Thomas Thiemann, Madhavan Varadarajan
doaj   +1 more source

Prelude to Simulations of Loop Quantum Gravity on Adiabatic Quantum Computers

open access: yesFrontiers in Astronomy and Space Sciences, 2021
The article addresses the possibility of implementing spin network states, used in the loop quantum gravity approach to Planck scale physics on an adiabatic quantum computer.
Jakub Mielczarek
doaj   +1 more source

Loop Quantum Cosmology, Modified Gravity and Extra Dimensions

open access: yesUniverse, 2016
Loop quantum cosmology (LQC) is a framework of quantum cosmology based on the quantization of symmetry reduced models following the quantization techniques of loop quantum gravity (LQG).
Xiangdong Zhang
doaj   +1 more source

Quasinormal modes of a massive scalar field nonminimally coupled to gravity in the spacetime of self-dual black hole

open access: yesEuropean Physical Journal C: Particles and Fields, 2021
In this work, we investigate the quasinormal modes for a massive scalar field with a nonminimal coupling with gravity in the spacetime of a loop quantum black hole, known as the self-dual black hole.
J. S. Santos, M. B. Cruz, F. A. Brito
doaj   +1 more source

1/N correction in holographic Wilson loop from quantum gravity

open access: yesJournal of High Energy Physics, 2019
We study 1/N corrections to a Wilson loop in holographic duality. Extending the AdS/CFT correspondence beyond the large N limit is an important but a subtle issue, as it needs quantum gravity corrections in the gravity side.
Koji Hashimoto   +2 more
doaj   +1 more source

Black-Hole Models in Loop Quantum Gravity

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   +1 more source

Home - About - Disclaimer - Privacy