Results 91 to 100 of about 2,110,870 (239)

Clocks and rods in Jackiw-Teitelboim quantum gravity [PDF]

Journal of High Energy Physics, 2019
We specify bulk coordinates in Jackiw-Teitelboim (JT) gravity using a boundary-intrinsic radar definition. This allows us to study and calculate exactly diff-invariant bulk correlation functions of matter-coupled JT gravity, which are found to satisfy ...
Andreas Blommaert, T. Mertens, H. Verschelde   +2 more
semanticscholar   +1 more source

Quantum theory from quantum gravity [PDF]

Physical Review D, 2004
17 pages, 2 eps ...
Markopoulou, Fotini, Smolin, Lee
openaire   +2 more sources

Dynamically Implementing the $\overline{\mathit{\mu }}$-Scheme in Cosmological and Spherically Symmetric Models in an Extended Phase Space Model

Universe, 2023
We consider an extended phase space formulation for cosmological and spherically symmetric models in which the choice of a given μ¯-scheme can be implemented dynamically.
Kristina Giesel, Hongguang Liu
doaj   +1 more source

Quantum Gravity

, 2004
General lectures on quantum gravity.Comment: Lectures given at Karpacz. 40 pages, submitted to Lecture Notes in Physics.
A. Ashtekar, A. M. Polyakov, A. Strominger, B. S. De Witt, C. Montonen, C. Rovelli, C. Rovelli, C.M. Hull, D. Friedan, E. Alvarez, E. Alvarez, E. Alvarez, E. Witten, F. Gliozzi, G. 't Hooft, G. Horowitz, G. Immirzi, G.'t Hooft, H. Kawai, H. Kodama, H. Osborn, I. Antoniadis, J. Alfaro, J. F. Barbero, J. F. Donoghue, J. Julve, J. Polchinski, J. Scherk, J.W. Barrett, K. S. Stelle, L. Freidel, L. Susskind, M. Blau, M. Luscher, M.B. Green, M.H. Goroff, R. Arnowitt, S. Hawking, S.R. Coleman, Z. Bern   +39 more
core   +2 more sources

Dimensionful deformations of Poincare' symmetries for a Quantum Gravity without ideal observers [PDF]

, 1998
Quantum Mechanics is revisited as the appropriate theoretical framework for the description of the outcome of experiments that rely on the use of classical devices.
Bohr N., GIOVANNI AMELINO-CAMELIA, Ng Y. J.   +2 more
core   +2 more sources

Quantum Gravity at a Lifshitz Point [PDF]

, 2009
We present a candidate quantum field theory of gravity with dynamical critical exponent equal to $z=3$ in the UV. (As in condensed-matter systems, $z$ measures the degree of anisotropy between space and time.) This theory, which at short distances ...
Petr Hořava
semanticscholar   +1 more source

The quantum gravity dynamics of near extremal black holes [PDF]

Journal of High Energy Physics, 2018
We study the quantum effects of Near-Extremal black holes near their horizons. The gravitational dynamics in such backgrounds are closely connected to a particle in AdS2 with constant electric field. We use this picture to solve the theory exactly.
Zhenbin Yang
semanticscholar   +1 more source

Noncommutative quantum gravity [PDF]

Physics Letters B, 2000
The possible role of gravity in a noncommutative geometry is investigated. Due to the Moyal *-product of fields in noncommutative geometry, it is necessary to complexify the metric tensor of gravity. We first consider the possibility of a complex Hermitian, nonsymmetric $g_{ }$ and discuss the problems associated with such a theory.
openaire   +2 more sources

Spontaneous Quantum Gravity

Journal of High Energy Physics, Gravitation and Cosmology, 2021
This article gives an elementary account of the recently proposed theory of spontaneous quantum gravity. It is argued that a viable quantum theory of gravity should be falsifiable, and hence it should dynamically explain the observed absence of quantum superpositions of space-time geometries in its classical limit.
openaire   +3 more sources

Quantum Geometry and Quantum Gravity [PDF]

AIP Conference Proceedings, 2008
To appear in the AIP Conference Proceedings of the XVI International Fall Workshop on Geometry and Physics, Lisbon - Portugal, 5-8 September ...
J. Fernando Barbero G., Rui Loja Fernandes, Roger Picken   +2 more
openaire   +3 more sources