Results 71 to 80 of about 178,240 (316)
Noncovariance of “covariant polymerization” in models of loop quantum gravity [PDF]
Physical Review D, 2021 15 pages, v2: new extended example of a bijective canonical ...
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, 2009 Quantum gravity may involve models with stochastic fluctuations of the associated metric field, around some fixed background value. Such stochastic models of gravity may induce decoherence for matter propagating in such fluctuating space time.
Mavromatos, Nick +4 more
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Testing different approaches to quantum gravity with cosmology: An overview [PDF]
, 2017 Among the available quantum gravity proposals, string theory, loop quantum gravity, non-commutative geometry, group field theory, causal sets, asymptotic safety, causal dynamical triangulation, emergent gravity are among the best motivated models.
Barrau, Aurélien
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Absorption, scattering, geodesics, shadows and lensing phenomena of black holes in effective quantum gravity [PDF]
Physics of the Dark UniverseIn this work, we investigate the signatures of black holes within an effective quantum gravity framework recently proposed in the literature [1] . We begin by outlining the general setup, highlighting the two distinct models under consideration.
N. Heidari +3 more
semanticscholar +1 more source
Some implications of signature-change in cosmological models of loop quantum gravity [PDF]
, 2015 Signature change at high density has been obtained as a possible consequence of deformed space-time structures in models of loop quantum gravity. This article provides a conceptual discussion of implications for cosmological scenarios, based on an ...
M. Bojowald, J. Mielczarek
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A Renormalizable Model of Quantum Gravity
, 2023 We develop a renormalizable model of Quantum General Relativity (QGR). We do this by building on earlier work with quantum electrodynamics (QED). Working with the Feynman path integral (FPI) approach to QED, we generalize the paths from varying in space to varying in space and time.
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Unified model of loop quantum gravity and matter [PDF]
General Relativity and Gravitation, 2006 4 pages, dedicated to Michael P.
Gambini, R., Olson, S. Jay, Pullin, J.
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Covariance in models of loop quantum gravity: Gowdy systems [PDF]
, 2015 Recent results in the construction of anomaly-free models of loop quantum gravity have shown obstacles when local physical degrees of freedom are present.
M. Bojowald, Suddhasattwa Brahma
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The Bronstein Hypercube of Quantum Gravity [PDF]
Beyond Spacetime, 2018 We argue for enlarging the traditional view of quantum gravity, based on ‘quantizing GR’, to include explicitly the non-spatiotemporal nature of the fundamental building blocks suggested by several modern quantum gravity approaches (and some semi ...
D. Oriti
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Renormalizable and Unitary Model of Quantum Gravity [PDF]
Symmetry, 2019 We consider R + R 2 relativistic quantum gravity with the action where all possible terms quadratic in the curvature tensor are added to the Einstein-Hilbert term. This model was shown to be renormalizable in the work by K.S. Stelle. In this paper, we demonstrate that the R + R 2 model is also unitary contrary to the statements made
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