Results 11 to 20 of about 2,307 (223)
Canonical Quantum Gravity, Constructive QFT, and Renormalisation [PDF]
Frontiers in Physics, 2020 The canonical approach to quantum gravity has been put on a firm mathematical foundation in the recent decades. Even the quantum dynamics can be rigorously defined, however, due to the tremendously non-polynomial character of the gravitational ...
Thomas Thiemann
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Three principles for canonical quantum gravity [PDF]
Studies in History and Philosophy of Science Part B - Studies in History and Philosophy of Modern Physics, 2014 zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Rodolfo Gambini, Jorge Pullin
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The Dynamical Evolution Parameter in Manifestly Covariant Quantum Gravity Theory [PDF]
EntropyA remarkable feature of manifestly covariant quantum gravity theory (CQG-theory) is represented by its unconstrained Hamiltonian structure expressed in evolution form.
Claudio Cremaschini
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Asymptotically safe — canonical quantum gravity junction
Journal of High Energy PhysicsThe canonical (CQG) and asymptotically safe (ASQG) approach to quantum gravity share to be both non-perturbative programmes. However, apart from that they seem to differ in several aspects such as: 1.
T. Thiemann
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A length operator for canonical quantum gravity [PDF]
Journal of Mathematical Physics, 1998 We construct an operator that measures the length of a curve in four-dimensional Lorentzian vacuum quantum gravity. We work in a representation in which an SU(2) connection is diagonal and it is therefore surprising that the operator obtained after regularization is densely defined, does not suffer from factor ordering singularities, and does not ...
T Thiemann, Thiemann T
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On Propagation in Loop Quantum Gravity
Universe, 2022 A rigorous implementation of the Wheeler–Dewitt equations was derived in the context of Loop Quantum Gravity (LQG) and was coined Quantum Spin Dynamics (QSD). The Hamiltonian constraint of QSD was criticised as being too local and to prevent “propagation”
Thomas Thiemann, Madhavan Varadarajan
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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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Canonical Quantum Gravity and the Problem of Time
, 1993 125 pages of LaTeX ...
C J Isham, Isham C J
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Are there ALPs in the asymptotically safe landscape?
Journal of High Energy Physics, 2022 We investigate axion-like particles (ALPs) in the context of asymptotically safe gravity-matter systems. The ALP-photon interaction, which facilitates experimental searches for ALPs, is a dimension-5-operator.
Gustavo P. de Brito +2 more
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Universe, 2022 Time in quantum gravity is not a well-defined notion despite its central role in the very definition of dynamics. Using the formalism of quantum geometrodynamics, we briefly review the problem and illustrate it with two proposed solutions.
Claus Kiefer, Patrick Peter
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