Results 21 to 30 of about 3,508 (162)
Journal of High Energy Physics, 2021 We assume that the points in volumes smaller than an elementary volume (which may have a Planck size) are indistinguishable in any physical experiment. This naturally leads to a picture of a discrete space with a finite number of degrees of freedom per ...
Ali H. Chamseddine, Viatcheslav Mukhanov
doaj +1 more source
Quantum gravity states, entanglement graphs and second-quantized tensor networks
Journal of High Energy Physics, 2021 In recent years, the import of quantum information techniques in quantum gravity opened new perspectives in the study of the microscopic structure of spacetime.
Eugenia Colafranceschi, Daniele Oriti
doaj +1 more source
Lattice Models of Quantum Gravity
, 1998 Standard Regge Calculus provides an interesting method to explore quantum gravity in a non-perturbative fashion but turns out to be a CPU-time demanding enterprise. One therefore seeks for suitable approximations which retain most of its universal features. The $Z_2$-Regge model could be such a desired simplification. Here the quadratic edge lengths $q$
Bittner, E. +5 more
openaire +3 more sources
Discrete gravity as a topological field theory with light-like curvature defects
Journal of High Energy Physics, 2017 I present a model of discrete gravity as a topological field theory with defects. The theory has no local degrees of freedom and the gravitational field is trivial everywhere except at a number of intersecting null surfaces.
Wolfgang Wieland
doaj +1 more source
Synthetic gravitational horizons in low-dimensional quantum matter
Physical Review Research, 2021 We propose a class of lattice models realizable in a wide range of setups whose low-energy dynamics exactly reduces to Dirac fields subjected to (1+1)-dimensional [(1+1)D] gravitational backgrounds, including (anti-)de Sitter space-time.
Corentin Morice +4 more
doaj +1 more source
Quantum gravity, the Planck lattice and the Standard Model
, 1995 Invited Talk at the ``VII Marcel Grossman Meeting on General Relativity'' - Stanford, July 1994. 14 pages, latex, five figures, which will be available upon request.
Preparata, Giuliano, Xue, She-Sheng
openaire +2 more sources
Gravity-capillary internal wave simulation using a binary fluid lattice Boltzmann model [PDF]
Applied Mathematical Modelling, 2004 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Buick, James +2 more
openaire +3 more sources
A lattice bosonic model as a quantum theory of gravity
, 2006 A local quantum bosonic model on a lattice is constructed whose low energy excitations are gravitons described by linearized Einstein action. Thus the bosonic model is a quantum theory of gravity, at least at the linear level. We find that the compactification and the discretization of metric tenor are crucial in obtaining a quantum theory of gravity.
Gu, Zheng-Cheng, Wen, Xiao-Gang
openaire +2 more sources
Tensor networks for dynamic spacetimes
Journal of High Energy Physics, 2017 Existing tensor network models of holography are limited to representing the geometry of constant time slices of static spacetimes. We study the possibility of describing the geometry of a dynamic spacetime using tensor networks.
A. May
doaj +1 more source
Edge length dynamics on graphs with applications to p-adic AdS/CFT
Journal of High Energy Physics, 2017 We formulate a Euclidean theory of edge length dynamics based on a notion of Ricci curvature on graphs with variable edge lengths. In order to write an explicit form for the discrete analog of the Einstein-Hilbert action, we require that the graph should
Steven S. Gubser +7 more
doaj +1 more source