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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.
Nicolae Sfetcu
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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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Some surprising implications of background independence in canonical quantum gravity [PDF]
, 2009 There is a precise sense in which the requirement of background independence suffices to uniquely select the kinematics of loop quantum gravity (LQG). Specifically, the fundamental kinematic algebra of LQG admits a unique diffeomorphism invariant state ...
A. Ashtekar
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Constraints in canonical quantum gravity
, 1998 Imperial Users ...
Fotini Markopoulou
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The canonical ensemble reloaded: the complex-stability of Euclidean quantum gravity for black holes in a box [PDF]
Journal of High Energy Physics, 2022 We revisit the stability of black hole saddles for the Euclidean path integral describing the canonical partition function Z ( β ) for gravity inside a spherical reflecting cavity.
D. Marolf, Jorge E Santos
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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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