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On the area operators of the Husain-Kuchar-Rovelli model and Canonical/Loop Quantum Gravity [PDF]
, 1998 I investigate the relation between an operative definition of the area of a surface specified by matter fields and the area operators recently introduced in the canonical/loop approach to Quantum Gravity and in Rovelli's variant of the Husain-Kuchar ...
Bohr N. +3 more
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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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Cosmological Issues for Revised Canonical Quantum Gravity [PDF]
, 2003 In a recent work we presented a reformulation of the canonical quantum gravity, based on adding the so-called kinematical term to the gravity-matter action; this revised approach leads to a self-consistent canonical quantization of the 3-geometries ...
Montani, Giovanni
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Modifications to gravitational wave equation from canonical quantum gravity [PDF]
European Physical Journal C: Particles and Fields, 2020 It is expected that the quantum nature of spacetime leaves its imprint in all semiclassical gravitational systems, at least in certain regimes, including gravitational waves.
Andrea Dapor, Klaus Liegener
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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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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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Canonical Quantum Gravity, Constructive QFT, and Renormalisation
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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