Results 111 to 120 of about 1,342,913 (205)
String Theory – Nomological Unification and the Epicycles of the Quantum Field Theory Paradigm [PDF]
, 2011 String Theory is the result of the conjunction of three conceptually independent elements: (i) the metaphysical idea of a nomological unity of the forces, (ii) the model-theoretical paradigm of Quantum Field Theory, and (iii) the conflict resulting from ...
Hedrich, Reiner
core
Microscopic unitary description of tidal excitations in high-energy string-brane collisions [PDF]
, 2013 The eikonal operator was originally introduced to describe the effect of tidal excitations on higher-genus elastic string amplitudes at high energy.
Veneziano G. +16 more
core +1 more source
Learning about Quantum Gravity with a Couple of Nodes
Symmetry, Integrability and Geometry: Methods and Applications, 2012 Loop Quantum Gravity provides a natural truncation of the infinite degrees of freedom of gravity, obtained by studying the theory on a given finite graph. We review this procedure and we present the construction of the canonical theory on a simple graph,
Enrique F. Borja +2 more
doaj +1 more source
Introduction to loop quantum gravity. The Holst’s action and the covariant formalism
International Journal of Geometric Methods in Modern PhysicsWe review Holst formalism and dynamical equivalence with standard GR (in dimension [Formula: see text]). Holst formalism is written for a spin coframe field [Formula: see text] and a [Formula: see text]-connection [Formula: see text] on spacetime [Formula: see text] and it depends on the Holst parameter [Formula: see text].
L. Fatibene +6 more
openaire +2 more sources
(2+1) gravity for higher genus in the polygon model [PDF]
, 2004 We construct explicitly a (12g − 12)-dimensional space P of unconstrained and independent initial data for ’t Hooft’s polygon model of (2+1) gravity for vacuum spacetimes with compact genus-g spacelike slices, for any g ≥ 2.
Kádár, Zoltán +5 more
core +2 more sources
Covariance in models of loop quantum gravity: Spherical symmetry
Physical Review D, 2015 Spherically symmetric models of loop quantum gravity have been studied recently by different methods that aim to deal with structure functions in the usual constraint algebra of gravitational systems. As noticed by Gambini and Pullin, a linear redefinition of the constraints (with phase-space dependent coefficients) can be used to eliminate structure ...
Bojowald, Martin +2 more
openaire +3 more sources
Reconstruction of quantum theory [PDF]
, 2006 What belongs to quantum theory is no more than what is needed for its derivation. Keeping to this maxim, we record a paradigmatic shift in the foundations of quantum mechanics, where the focus has recently from interpreting to reconstructing quantum ...
Grinbaum, Alexei
core
New perspective on matter coupling in 2D quantum gravity [PDF]
, 1999 We provide compelling evidence that a previously introduced model of nonperturbative 2D Lorentzian quantum gravity exhibits (two-dimensional) flat-space behavior when coupled to Ising spins.
Ambj¢rn, J. +11 more
core +1 more source
88th Annual Meeting of the Meteoritical Society 2026: Abstracts
Meteoritics &Planetary Science, Volume 61, Issue S1, Page S48-S551, August 2026.
wiley +1 more source