Results 81 to 90 of about 1,164 (183)
Symmetric configurations highlighted by collective quantum coherence
European Physical Journal C: Particles and Fields, 2017 Recent developments in quantum gravity have shown the Lorentzian treatment to be a fruitful approach towards the emergence of macroscopic space-times. In this paper, we discuss another related aspect of the Lorentzian treatment: we argue that collective ...
Dennis Obster, Naoki Sasakura
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Nonperturbative solutions for canonical quantum gravity: An overview [PDF]
Physics Reports, 1997 In this paper we will make a survey of solutions to the Wheeler-Dewitt equation which have been found up to now in Ashtekar's formulation for canonical quantum gravity. Roughly speaking they are classified into two categories, namely, Wilson-loop solutions and topological solutions.
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Symplectic Structure of Intrinsic Time Gravity
Universe, 2016 The Poisson structure of intrinsic time gravity is analysed. With the starting point comprising a unimodular three-metric with traceless momentum, a trace-induced anomaly results upon quantization.
Eyo Eyo Ita, Amos S. Kubeka
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Relational Lorentzian Asymptotically Safe Quantum Gravity: Showcase Model
UniverseIn a recent contribution, we identified possible points of contact between the asymptotically safe and canonical approaches to quantum gravity. The idea is to start from the reduced phase space (often called relational) formulation of canonical quantum ...
Renata Ferrero, Thomas Thiemann
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Tunnelling to holographic traversable wormholes
SciPost PhysicsWe study nonperturbative effects of quantum gravity in a system consisting of a coupled pair of holographic CFTs. The AdS$_4$/CFT$_3$ system has three possible ground states: two copies of empty AdS, a pair of extremal AdS black holes, and an eternal AdS
Suzanne Bintanja, Ben Freivogel, Andrew Rolph
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Canonical “Loop” Quantum Gravity and Spin Foam Models [PDF]
, 2000 The canonical ``loop'' formulation of quantum gravity is a mathematically well defined, background independent, non perturbative standard quantization of Einstein's theory of General Relativity. Some among the most meaningful results of the theory are: 1) the complete calculation of the spectrum of geometric quantities like the area and the volume and ...
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From Timeless Physical Theories to Timelessness
Humana.Mente: Journal of Philosophical Studies, 2018 This paper addresses the extent to which both Julian Barbour‘s Machian formulation of general relativity and his interpretation of canonical quantum gravity can be called timeless. We differentiate two types of timelessness in Barbour‘s (1994a, 1994b and
Samuel Baron +2 more
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Emergent Time and Time Travel in Quantum Physics
UniverseEntertaining the possibility of time travel will invariably challenge dearly-held concepts in fundamental physics. It becomes relatively easy to construct multiple logical contradictions using differing starting points from various well-established ...
Ana Alonso-Serrano +2 more
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The Genesis of Canonical Quantum Gravity
, 2018 ReferencesFootnotes
Blum, A., Salisbury, D.
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Classical and quantum cosmology of f(R) gravity’s rainbow in Schutz’s formalism
European Physical Journal C: Particles and FieldsWe investigate the classical and quantum dynamics of f(R) gravity’s rainbow in the presence of a perfect fluid, employing Schutz’s formalism to establish a well-defined notion of time. In the classical regime, we derive and solve the equations of motion,
Andrés Burton-Villalobos +3 more
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