Results 91 to 100 of about 1,243 (181)

Time evolution in canonical quantum gravity is trivial

Annals of Physics
The Wheeler-DeWitt (WdW) equation does not describe any explicit time evolution of the wave function, and somehow related to this issue, there is no natural way of defining an invariant inner product that provides a viable probability interpretation.
openaire   +2 more sources

Classical and quantum cosmology of f(R) gravity’s rainbow in Schutz’s formalism

European Physical Journal C: Particles and Fields
We investigate the classical and quantum dynamics of f(R) gravity’s rainbow in the presence of a perfect fluid, employing Schutz’s formalism to establish a well-defined notion of time. In the classical regime, we derive and solve the equations of motion,
Andrés Burton-Villalobos, Giovanni Otalora, Manuel Gonzalez-Espinoza, Yoelsy Leyva   +3 more
doaj   +1 more source

Statistical Thermodynamics of Polymer Quantum Systems

Symmetry, Integrability and Geometry: Methods and Applications, 2011
Polymer quantum systems are mechanical models quantized similarly as loop quantum gravity. It is actually in quantizing gravity that the polymer term holds proper as the quantum geometry excitations yield a reminiscent of a polymer material.
Guillermo Chacón-Acosta, Elisa Manrique, Leonardo Dagdug, Hugo A. Morales-Técotl   +3 more
doaj   +1 more source

Canonical Loop Quantum Gravity

This article presents a comprehensive and self-contained review of Loop Quantum Gravity (LQG), focusing on both its canonical (Hamiltonian) formulation and covariant (spin foam) path integral approach. Beginning with the reformulation of General Relativity using Ashtekar–Barbero variables, it systematically constructs the kinematical Hilbert space ...
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Quantum Schwarzschild-(A)dS black holes: unitarity and singularity resolution

Journal of High Energy Physics
We consider the canonical quantisation of spherically symmetric spacetimes within unimodular gravity, leaving sign choices in the metric general enough to include both the interior and exterior Schwarzschild-(Anti-)de Sitter spacetime.
Steffen Gielen, Sofie Ried
doaj   +1 more source

Canonical Quantum Gravity [PDF]

, 1994
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A Complex Tension Origin for Dilaton Gravity: Jordan Stiffness and Logarithmic Einstein Dynamics. [PDF]

Entropy (Basel)
Vaillant M, Scott TC.
europepmc   +1 more source

Quantum Gravity Spacetime: Universe vs. Multiverse. [PDF]

Entropy (Basel)
Tessarotto M, Cremaschini C.
europepmc   +1 more source

Volume-Law Entropy as a Mesoscopic Anomaly. [PDF]

Entropy (Basel)
Bougueroua L.
europepmc   +1 more source

Planar Black Holes and Entanglement Entropy in Analog Gravity Models. [PDF]

Entropy (Basel)
Bilic N, Zingg T.
europepmc   +1 more source