Results 21 to 30 of about 1,342,913 (205)
SPACETIME OR QUANTUM PARTICLES: THE ONTOLOGY OF QUANTUM GRAVITY? [PDF]
, 1996 The domains of quantum theory and general relativity overlap in situations where quantum mechanical effects cannot be ignored. In order to deal with this overlap of theoretical domains, there has been a tendency to apply the rules of quantum field theory
Peter J. Riggs +2 more
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Introduction to Quantization of Conformal Gravity
Universe, 2022 A method for consistent quantization of conformal gravity treating conformal symmetry in a very controllable way is presented. First, we discuss local conformal symmetry in the framework of gravitational interactions, where we view it as an example of a ...
Lesław Rachwał
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Covariant Loop Quantum Gravity, An Introduction and some Mathematical Tools [PDF]
, 2022 The aim of this thesis is to give a presentation of Loop Quantum Gravity in its covariant form, also known as spinfoam approach, and to present the basic mathematical tools to access the theory ...
Benfari, Filippo
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A small non-vanishing cosmological constant from the Krein–Gupta–Bleuler vacuum
Physics Letters B, 2018 We point out a potential relevance between the Krein–Gupta–Bleuler (KGB) vacuum leading to a fully covariant quantum field theory for gravity in de Sitter (dS) spacetime and the observable smallness of the cosmological constant.
Hamed Pejhan +3 more
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Wave Functional of the Universe and Time
Universe, 2021 A version of the quantum theory of gravity based on the concept of the wave functional of the universe is proposed. To determine the physical wave functional, the quantum principle of least action is formulated as a secular equation for the corresponding
Natalia Gorobey +2 more
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Quantum-Gravity Stochastic Effects on the de Sitter Event Horizon
Entropy, 2020 The stochastic character of the cosmological constant arising from the non-linear quantum-vacuum Bohm interaction in the framework of the manifestly-covariant theory of quantum gravity (CQG theory) is pointed out.
Claudio Cremaschini, Massimo Tessarotto
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Philosophy of Physics, 2023 Entropy bounds have played an important role in the development of holography as an approach to quantum gravity, so in this article we seek to gain a better understanding of the covariant entropy bound.
Emily Adlam
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Quantum Gravity: Motivations and Alternatives [PDF]
, 2009 The mutual conceptual incompatibility between General Relativity and Quantum Mechanics / Quantum Field Theory is generally seen as the most essential motivation for the development of a theory of Quantum Gravity.
Hedrich, Reiner
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Lorentz covariance of loop quantum gravity [PDF]
Physical Review D, 2011 The kinematics of loop gravity can be given a manifestly Lorentz-covariant formulation: the conventional SU(2)-spin-network Hilbert space can be mapped to a space K of SL(2,C) functions, where Lorentz covariance is manifest. K can be described in terms of a certain subset of the "projected" spin networks studied by Livine, Alexandrov and Dupuis.
Rovelli, Carlo, Speziale, Simone
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The Uncertainty Principle and the Minimal Space–Time Length Element
Physics, 2022 Quantum gravity theories rely on a minimal measurable length for their formulations, which clashes with the classical formulation of the uncertainty principle and with Lorentz invariance from general relativity.
David Escors, Grazyna Kochan
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