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Constraining the loop quantum gravity parameter space from phenomenology
Physics Letters B, 2018 Development of quantum gravity theories rarely takes inputs from experimental physics. In this letter, we take a small step towards correcting this by establishing a paradigm for incorporating putative quantum corrections, arising from canonical quantum ...
Suddhasattwa Brahma, Michele Ronco
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No fermion doubling in quantum geometry
Physics Letters B, 2015 In loop quantum gravity the discrete nature of quantum geometry acts as a natural regulator for matter theories. Studies of quantum field theory in quantum space–times in spherical symmetry in the canonical approach have shown that the main effect of the
Rodolfo Gambini, Jorge Pullin
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Toward a Background Independent Quantum Theory of Gravity
, 2004 Any canonical quantum theory can be understood to arise from the compatibility of the statistical geometry of distinguishable observations with the canonical Poisson structure of Hamiltonian dynamics. This geometric perspective offers a novel, background
Banks T. +5 more
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Quantum Big-Bounce as a phenomenology of RQM in the Mini-superspace
Physics Letters BWe investigate the emergence of a quantum Big-Bounce in the context of an isotropic Universe, filled by a self-interacting scalar field, which plays the role of a physical clock. The bouncing cosmology is the result of a scattering process, driven by the
Simone Lo Franco, Giovanni Montani
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Wheeler-DeWitt equation and Feynman diagrams
, 1997 We present a systematic expansion of all constraint equations in canonical quantum gravity up to the order of the inverse Planck mass squared. It is demonstrated that this method generates the conventional Feynman diagrammatic technique involving ...
Andrei O. Barvinsky +50 more
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Quantum imploding scalar fields [PDF]
Royal Society Open Science, 2018 The d’Alembertian □ϕ = 0 has the solution ϕ = f(v)/r, where f is a function of a null coordinate v, and this allows creation of a divergent singularity out of nothing.
Mark D. Roberts
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Canonical gravity in two time and two space dimensions
, 2011 We describe a program for developing a canonical gravity in 2+2 dimensions (two time and two space dimensions). Our procedure is similar to the usual canonical gravity but with two times rather than just one time.
Björner A., Hull C., J. A. NIETO
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Spin Foams and Canonical Quantization
Symmetry, Integrability and Geometry: Methods and Applications, 2012 This review is devoted to the analysis of the mutual consistency of the spin foam and canonical loop quantizations in three and four spacetime dimensions.
Sergei Alexandrov +2 more
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On Characterizing the Quantum Geometry Underlying Asymptotic Safety
Frontiers in Physics, 2020 The asymptotic safety program builds on a high-energy completion of gravity based on the Reuter fixed point, a non-trivial fixed point of the gravitational renormalization group flow. At this fixed point the canonical mass-dimension of coupling constants
Aleksandr Kurov, Frank Saueressig
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Quantum isolated horizons and black hole entropy
, 2012 We give a short introduction to the approaches currently used to describe black holes in loop quantum gravity. We will concentrate on the classical issues related to the modeling of black holes as isolated horizons, give a short discussion of their ...
G., J. Fernando Barbero +2 more
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