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The philosophy behind quantum gravity [PDF]
, 2006 This paper investigates some of the philosophical and conceptual issues raised by the search for a quantum theory of gravity. It is critically discussed whether such a theory is necessary in the first place, and how much would be accomplished if it is ...
Zinkernagel, Henrik +2 more
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Æther as an Inevitable Consequence of Quantum Gravity [PDF]
, 2022 The fact that quantum gravity does not admit an invariant vacuum state has far-reaching consequences for all physics. It points out that space could not be empty, and we return to the notion of an æther.
Vladimir Kalashnikov +3 more
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Journal of High Energy Physics, 2021 We study the genus expansion on compact Riemann surfaces of the gravitational path integral Z grav m $$ {\mathcal{Z}}_{\mathrm{grav}}^{(m)} $$ in two spacetime dimensions with cosmological constant Λ > 0 coupled to one of the non-unitary minimal models ...
Dionysios Anninos, Beatrix Mühlmann
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Dilaton gravity, Poisson sigma models and loop quantum gravity [PDF]
Classical and Quantum Gravity, 2009 31 ...
Bojowald, Martin, Reyes, Juan D.
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A proposal for a Bohmian ontology of quantum gravity [PDF]
, 2013 The paper shows how the Bohmian approach to quantum physics can be applied to develop a clear and coherent ontology of non-perturbative quantum gravity.
Michael Esfeldy +7 more
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2D gravitational Mabuchi action on Riemann surfaces with boundaries
Journal of High Energy Physics, 2017 We study the gravitational action induced by coupling two-dimensional non-conformal, massive matter to gravity on a Riemann surface with boundaries. A small-mass expansion gives back the Liouville action in the massless limit, while the first-order mass ...
Adel Bilal, Corinne de Lacroix
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Discrete Gravity Models and Loop Quantum Gravity: a Short Review [PDF]
Symmetry, Integrability and Geometry: Methods and Applications, 2012 v2: many amendments, matches published ...
Dupuis, Maite +2 more
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Two dimensional nearly de Sitter gravity
Journal of High Energy Physics, 2021 We study some aspects of the de Sitter version of Jackiw-Teitelboim gravity. Though we do not have propagating gravitons, we have a boundary mode when we compute observables with a fixed dilaton and metric at the boundary.
Juan Maldacena +2 more
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NEW SPIN FOAM MODELS OF QUANTUM GRAVITY [PDF]
Modern Physics Letters A, 2005 We give a brief and a critical review of the Barret-Crane spin foam models of quantum gravity. Then we describe two new spin foam models which are obtained by direct quantization of General Relativity and do not have some of the drawbacks of the Barret-Crane models.
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MINISUPERSPACE MODEL FOR REVISED CANONICAL QUANTUM GRAVITY [PDF]
International Journal of Modern Physics D, 2004 We present a reformulation of the canonical quantization of gravity, as referred to the minisuperspace; the new approach is based on fixing a Gaussian (or synchronous) reference frame and then quantizing the system via the reconstruction of a suitable constraint; then the quantum dynamics is re-stated in a generic coordinates system and it becomes ...
openaire +2 more sources