Results 81 to 90 of about 500,703 (203)
Space and Time in Loop Quantum Gravity [PDF]
arXiv, 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.
arxiv
Strings, loops and others: a critical survey of the present approaches to quantum gravity [PDF]
arXiv, 1998 I review the present theoretical attempts to understand the quantum properties of spacetime. In particular, I illustrate the main achievements and the main difficulties in: string theory, loop quantum gravity, discrete quantum gravity (Regge calculus, dynamical triangulations and simplicial models), Euclidean quantum gravity, perturbative quantum ...
arxiv
Living Reviews in Relativity, 2005 Quantum gravity is expected to be necessary in order to understand situations where classical general relativity breaks down. In particular in cosmology one has to deal with initial singularities, i.e., the fact that the backward evolution of a classical
Bojowald Martin
doaj
Rainbow-Like Black-Hole Metric from Loop Quantum Gravity
Universe, 2018 Hypersurface deformation algebra consists of a fruitful approach to derive deformed solutions of general relativity based on symmetry considerations with quantum-gravity effects, of which the linearization has been recently demonstrated to be connected ...
Iarley P. Lobo, Michele Ronco
doaj +1 more source
(b,v)-type variables for black to white hole transitions in effective loop quantum gravity
Physics 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
Squeezed vacua in loop quantum gravity [PDF]
arXiv, 2016 We introduce squeezed vacua in loop quantum gravity, a new overcomplete basis of states that contain prescribable correlations between geometric operators. We study the behavior of long-range correlations and discuss the relevance of these states for the reconstruction of a semiclassical spacetime from loop quantum gravity.
arxiv
Intersecting Quantum Gravity with Noncommutative Geometry - a Review
Symmetry, Integrability and Geometry: Methods and Applications, 2012 We review applications of noncommutative geometry in canonical quantum gravity. First, we show that the framework of loop quantum gravity includes natural noncommutative structures which have, hitherto, not been explored.
Johannes Aastrup +1 more
doaj +1 more source
Quantum phenomenological gravitational dynamics: a general view from thermodynamics of spacetime
Journal of High Energy Physics, 2020 In this work we derive general quantum phenomenological equations of gravitational dynamics and analyse its features. The derivation uses the formalism developed in thermodynamics of spacetime and introduces low energy quantum gravity modifications to it.
A. Alonso-Serrano, M. Liška
doaj +1 more source
Loops, Loop Sequences and Loop Surfaces in Statistical Geodesics, and Quantum Information [PDF]
arXiv, 2010 The locus of probability flow in Quantum Mechanics and information is explored. We explore loops, loop sequences and loop surfaces in the statistical geodesics. Having known about the loop character of the statistical geodesics in probability space, we discuss wider physical aspects of consequences of the geometry of the probabilities in the form of ...
arxiv
Universe, 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 +1 more source