Results 41 to 50 of about 139,198 (323)

Particle Scattering in Loop Quantum Gravity [PDF]

Physical Review Letters, 2005
We devise a technique for defining and computing n-point functions in the context of a background-independent gravitational quantum field theory. We construct a tentative implementation of this technique in a perturbatively-finite loop/spinfoam model.
Leonardo Modesto, Carlo Rovelli
openalex   +7 more sources

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, R. Gambini, L. Lehner, S. Liebling, J. Pullin   +4 more
semanticscholar   +1 more source

Quantum information in loop quantum gravity

Journal of Physics: Conference Series, 2006
RevTex, 5 pages. Proceedings of QG'05, Cala Gonone, 2005 Relations of the coarse-graining and partial tracing are clarified, and the references are ...
Daniel R. Terno
openalex   +4 more sources

On loop states in loop-quantum gravity [PDF]

Classical and Quantum Gravity, 2007
We explicitly construct and characterize all possible independent loop states in 3+1 dimensional loop quantum gravity by regulating it on a 3-d regular lattice in the Hamiltonian formalism. These loop states, characterized by the (dual) angular momentum quantum numbers, describe SU(2) rigid rotators on the links of the lattice.
Manu Mathur, N. D. Hari Dass
openaire   +3 more sources

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

Universe, 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, Florencia Benítez, Jorge Pullin   +2 more
doaj   +1 more source

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

Physical Review D, 2020
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, Saurya Das, Samantha Hergott, S. Rastgoo   +3 more
semanticscholar   +1 more source

Automorphisms in loop quantum gravity [PDF]

Classical and Quantum Gravity, 2009
57 pages, 7 ...
Thomas Thiemann, Benjamin Bahr
openaire   +4 more sources

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

No-go result for covariance in models of loop quantum gravity [PDF]

, 2020
Based on the observation that the exterior space-times of Schwarzschild-type solutions allow two symmetric slicings, a static spherically symmetric one and a timelike homogeneous one, modifications of gravitational dynamics suggested by symmetry-reduced ...
M. Bojowald
semanticscholar   +1 more source

Loop Quantum Gravity [PDF]

, 1997
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-
A Ashtekar, A Ashtekar, A Ashtekar, A Ashtekar, A Ashtekar, A Ashtekar, A Ashtekar, A Ashtekar, A Ashtekar, A Ashtekar, A Ashtekar, A Ashtekar, A Ashtekar, A Ashtekar, A Ashtekar, A Connes, A Connes, A Guichardet, A Higuchi, A Sen, A Strominger, AP Balachandran, AP Balachandran, AP Yutsin, B Brügmann, B Brügmann, B Brügmann, B Brügmann, B Brügmann, B Brügmann, B Brügmann, B Brügmann, C Bartolo Di, C Bartolo Di, C Bartolo Di, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, C Rovelli, CJ Isham, CJ Isham, CJ Isham, CJ Isham, CJ Isham, CJ Isham, D Amati, D Amati, D Amati, D Amati, D Marolf, D Marolf, D Marolf, D Marolf, D Marolf, DM Brink, E Witten, F Barbero, F Barbero, F Barbero, F Barbero, G Hooft ’t, G Horowitz, G Horowitz, G Horowitz, G Immirzi, H Kodama, H Verlinde, HA Morales-Técotl, HA Morales-Técotl, J Hartle, J Hartle, J Hartle, J Iwasaki, J Iwasaki, J Iwasaki, J Lewandowski, J Lewandowski, J Lewandowski, J Pullin, J Zegwaard, JC Baez, JC Baez, JC Baez, JC Baez, JC Baez, JC Baez, JC Baez, JC Baez, JC Baez, JD Bekenstein, JW York, K Krasnov, K Krasnov, K Krasnov, K Krasnov, K Wilson, L Crane, L Crane, L Crane, L Crane, L Smolin, L Smolin, L Smolin, LH Kauffman, LH Kauffman, M Agishtein, M Barreira, M Reisenberger, M Reisenberger, MP Blencowe, N Grot, P Citanovi`c, R Borissov, R Borissov, R Borissov, R DePietri, R DePietri, R Gambini, R Gambini, R Gambini, R Gambini, R Gambini, R Gambini, R Gambini, R Loll, R Loll, R Loll, R Penrose, R Penrose, R Penrose, R Penrose, RM Wald, S Carlip, S Carlip, S Carlip, S Catterall, S Fritelli, S Frittelli, S Frittelli, S Frittelli, S Hawking, S Hawking, SW Hawking, T Jacobson, T Thiemann, T Thiemann, TJ Foxon, V Husain, V Husain   +172 more
core   +4 more sources