Results 41 to 50 of about 165,231 (345)
RENORMALIZATION FOR SPIN FOAM MODELS OF QUANTUM GRAVITY [PDF]
The Tenth Marcel Grossmann Meeting, 2006 5 pages, talk given at the 10th Marcel Grossmann meeting, Rio de Janeiro, July ...
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ON INHOMOGENEITY OF A STRING BIT MODEL FOR QUANTUM GRAVITY [PDF]
International Journal of Modern Physics D, 2005 We study quantum gravitational effect on a two-dimensional open universe with one particle by means of a string bit model. We find that matter is necessarily homogeneously distributed if the influence of the particle on the size of the universe is optimized.
Lee, C.-W. H., Mann, R. B.
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Exactly solvable models of 2D dilaton quantum gravity [PDF]
Physics Letters B, 1992 We study canonical quantization of a class of 2d dilaton gravity models, which contains the model proposed by Callan, Giddings, Harvey and Strominger. A set of non-canonical phase space variables is found, forming an $SL(2,{\bf R}) \times U(1)$ current algebra, such that the constraints become quadratic in these new variables.
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Quantum Machian time in toy models of gravity [PDF]
Classical and Quantum Gravity, 2009 27 pages, references added, typos fixed, additional comments added to abs/intro/concl, journal ref ...
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Testing a (Stringy) Model of Quantum Gravity [PDF]
, 2001 I discuss a specific model of space-time foam, inspired by the modern non-perturbative approach to string theory (D-branes). The model views our world as a three brane, intersecting with D-particles that represent stringy quantum gravity effects, which can be real or virtual.
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Renormalization of 3d quantum gravity from matrix models
Physics Letters B, 2004 14 pages, 3 ...
Ambjørn, Jan +2 more
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Quantum Gravity - Testing Time for Theories [PDF]
, 1999 The extreme smallness of both the Planck length, on the one side, and the ratio of the gravitational to the electrical forces between, say, two electrons, on the other side has led to a widespread belief that the realm of quantum gravity is beyond ...
D. V. Ahluwalia +6 more
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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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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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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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