Results 11 to 20 of about 1,549,437 (171)
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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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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Relational Lorentzian Asymptotically Safe Quantum Gravity: Showcase Model [PDF]
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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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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Detecting deformed commutators with exceptional points in optomechanical sensors
New Journal of Physics, 2021 Models of quantum gravity imply a modification of the canonical position-momentum commutation relations. In this paper, working with a binary mechanical system, we examine the effect of quantum gravity on the exceptional points of the system.
Dianzhen Cui +3 more
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Physics Letters B, 2023 A new class of modified gravity theories, made possible by subtle features of the canonical formulation of general covariance, naturally allows MOND-like behavior (MOdified Newtonian Dynamics) in effective space-time solutions without introducing new ...
Martin Bojowald, Erick I. Duque
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PARAMETRIZING FLUIDS IN CANONICAL QUANTUM GRAVITY [PDF]
International Journal of Modern Physics A, 2008 The problem of time is an unsolved issue of canonical General Relativity. A possible solution is the Brown-Kuchař mechanism which couples matter to the gravitational field and recovers a physical, i.e. non vanishing, observable Hamiltonian functional by manipulating the set of constraints. Two cases are analyzed.
Zonetti, Simone, Montani, Giovanni
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Space–Time Physics in Background-Independent Theories of Quantum Gravity
Universe, 2021 Background independence is often emphasized as an important property of a quantum theory of gravity that takes seriously the geometrical nature of general relativity.
Martin Bojowald
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The dynamics of cosmological scenarios inspired by quantum gravity [PDF]
, 2006 PhDIn this thesis we study the dynamics of cosmological scenarios inspired by quantum gravity. Part I investigates novel features of the semi-classical regime of homogeneous and isotropic loop quantum cosmology.
Mulryne, David James
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