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2017
Letting aside temporarily the possibility to unify all forces in a single consistent framework, a question one can ask oneself is whether quantum mechanics can resolve a particular singularity, such as the big bang or that inside a black hole.
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Letting aside temporarily the possibility to unify all forces in a single consistent framework, a question one can ask oneself is whether quantum mechanics can resolve a particular singularity, such as the big bang or that inside a black hole.
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Time and the interpretation of canonical quantum gravity
Physical Review D, 1989The unsatisfactory status of the interpretation of the wave function of the Universe in canonical quantum gravity is reviewed. The ``naive interpretation'' obtained by straightforwardly applying the standard interpretive rules to the canonical quantization of general relativity is manifestly unacceptable; the ``WKB interpretation'' has only a limited ...
, Unruh, , Wald
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Canonical Loop Quantum Gravity
This article presents a comprehensive and self-contained review of Loop Quantum Gravity (LQG), focusing on both its canonical (Hamiltonian) formulation and covariant (spin foam) path integral approach. Beginning with the reformulation of General Relativity using Ashtekar–Barbero variables, it systematically constructs the kinematical Hilbert space ...openaire +1 more source
Time and complex numbers in canonical quantum gravity
Physical Review D, 1993It is noted that not only time but also the imaginary unit is absent from the Wheeler-DeWitt equation (WDE), the basic equation of canonical quantum gravity. This leads to a severe problem in an attempt to recover the time-dependent Schrodinger equation from the WDE. It is suggested that the problem will be solved if the WDE is actually complex and not
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Canonical Quantum Gravity and Effective Theory
2009Effective actions provide a powerful way to understand low-energy, semiclassical or other regimes of quantum field theories. Although canonical quantum gravity theories, such as loop quantum gravity, are not directly accessible to the usual techniques of computing effective actions, equivalent methods to derive an effective Hamiltonian and effective ...
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Solvable models of quantum black holes: a review on Jackiw–Teitelboim gravity
Living Reviews in Relativity, 2023Thomas Mertens, Gustavo Joaquin Turiaci
exaly
Epistemology of Loop Quantum Gravity in the Context of Canonical Quantum Gravity
Cunoașterea ȘtiințificăIn the quest to comprehend the fundamental nature of the universe, physicists have delved into the realms of quantum mechanics and general relativity. However, joining these two pillars of modern physics into a unified framework has been a longstanding challenge.
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Quantum Gravity in 2 + 1 Dimensions: The Case of a Closed Universe
Living Reviews in Relativity, 2005Steven Carlip
exaly