Results 11 to 20 of about 32,973 (309)
Relational Lorentzian Asymptotically Safe Quantum Gravity: Showcase Model
UniverseIn a recent contribution, we identified possible points of contact between the asymptotically safe and canonical approaches to quantum gravity. The idea is to start from the reduced phase space (often called relational) formulation of canonical quantum ...
Renata Ferrero, Thomas Thiemann
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On quantum gravity and quantum gravity phenomenology
The Sixteenth Marcel Grossmann Meeting, 2023 This article summarizes a new approach to quantum gravity based on the concepts of modular spacetime, Born geometry, and metastring theory and their applications to quantum gravity phenomenology. In particular, we discuss a new understanding of dark matter in terms of metaparticles (zero modes of the metastring) and its relation to dark energy (the ...
Edmonds, Douglas +2 more
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SYNCHRONOUS QUANTUM GRAVITY [PDF]
International Journal of Modern Physics A, 2008 The implications of restricting the covariance principle within a Gaussian gauge are developed both on a classical and a quantum level. Hence, we investigate the cosmological issues of the obtained Schrödinger Quantum Gravity with respect to the asymptotically early dynamics of a generic Universe.
CIANFRANI, Francesco, MONTANI, Giovanni
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Quantum channels in quantum gravity [PDF]
International Journal of Modern Physics D, 2014 The black hole final state proposal implements manifest unitarity in the process of black hole formation and evaporation in quantum gravity, by postulating a unique final state boundary condition at the singularity. We argue that this proposal can be embedded in the gauge/gravity context by invoking a path integral formalism inspired by the Schwinger ...
Rangamani, Mukund, Rota, Massimilliano
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International Journal of Modern Physics D, 2001 The Wheeler–DeWitt equation in quantum gravity is timeless in character. In order to discuss quantum to classical transition of the universe, one uses a time prescription in quantum gravity to obtain a time contained description starting from Wheeler–DeWitt equation and WKB ansatz for the WD wavefunction. The approach has some drawbacks. In this work,
Biswas, S., Shaw, A., Modak, B.
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Fermions in quantum gravity [PDF]
Physical Review Letters, 1994 We study the quantum fermions+gravity system, that is, the gravitational counterpart of QED. We start from the standard Einstein-Weyl theory, reformulated in terms of Ashtekar variables; and we construct its non- perturbative quantum theory by extending the loop representation of general relativity.
Morales-Técotl, Hugo A., Rovelli, Carlo
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QUANTUM GRAVITY AND TURBULENCE [PDF]
International Journal of Modern Physics D, 2010 We apply recent advances in quantum gravity to the problem of turbulence. Adopting the AdS/CFT approach we propose a string theory of turbulence that explains the Kolmogorov scaling in 3 + 1 dimensions and the Kraichnan and Kolmogorov scalings in 2 + 1 dimensions.
Jejjala, Vishnu +3 more
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Non-Local Game of Life in 2D Quasicrystals
Crystals, 2018 On a two-dimensional quasicrystal, a Penrose tiling, we simulate for the first time a game of life dynamics governed by non-local rules. Quasicrystals have inherently non-local order since any local patch, the emperor, forces the existence of a large ...
Fang Fang +3 more
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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. +2 more
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Mathematics, 2018 In geometrically frustrated clusters of polyhedra, gaps between faces can be closed without distorting the polyhedra by the long established method of discrete curvature, which consists of curving the space into a fourth dimension, resulting in a ...
Fang Fang, Richard Clawson, Klee Irwin
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