منابع مشابه
Quantum-Wave Equation and Heisenberg Inequalities of Covariant Quantum Gravity
Key aspects of the manifestly-covariant theory of quantum gravity (Cremaschini and Tessarotto 2015–2017) are investigated. These refer, first, to the establishment of the four-scalar, manifestly-covariant evolution quantum wave equation, denoted as covariant quantum gravity (CQG) wave equation, which advances the quantum state ψ associated with a prescribed background space-time. In this paper,...
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A scale–dependent effective action for gravity is introduced and an exact nonperturbative evolution equation is derived which governs its renormalization group flow. It is invariant under general coordinate transformations and satisfies modified BRS Ward–Identities. The evolution equation is solved for a simple truncation of the space of actions. In 2+ε dimensions, nonperturbative corrections t...
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We study the simplicial quantum gravity in three dimensions. Motivated by the Boulatov’s model which generates a sum over simplicial complexes weighted with the Turaev-Viro invariant, we introduce boundary operators in the simplicial gravity associated to compact orientable surfaces. An amplitude of the boundary operator is given by a sum over triangulations in the interior of the boundary surf...
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Bouncing oil droplets have been shown to follow de Broglie-Bohm like trajectories and at the same time they exhibit attractive and repulsive pseudo-gravitation. We propose a model aimed at rendering account of these phenomenological observations. It inspires, in a more speculative approach, a toy model for quantum gravity. In studies concerning quantum wave mechanics, de Broglie-Bohm (dB-B) tra...
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The goal of this article is to present a broad perspective on quantum gravity for non-experts. After a historical introduction, key physical problems of quantum gravity are illustrated. While there are a number of interesting and insightful approaches to address these issues, over the past two decades sustained progress has primarily occurred in two programs: string theory and loop quantum grav...
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ژورنال
عنوان ژورنال: Classical and Quantum Gravity
سال: 2015
ISSN: 0264-9381,1361-6382
DOI: 10.1088/0264-9381/32/12/124005