Results 121 to 130 of about 1,549,437 (171)

Universal thermodynamic topological classes of the charged dRGT black string

Physics Letters B
In this study, we explore universal thermodynamic topological classes of charged dRGT black string within both the canonical ensemble and grand canonical ensemble frameworks, and further analyze its asymptotic behavior under limiting parameter regimes ...
Hao Chen, Meng-Yao Zhang, Yi Yang, Qihong Huang, Zheng-Wen Long   +4 more
doaj   +1 more source

88th Annual Meeting of the Meteoritical Society 2026: Abstracts

Meteoritics &Planetary Science, Volume 61, Issue S1, Page S48-S551, August 2026.
wiley   +1 more source

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

Take a Ride on a Time Machine [PDF]

, 2003
We discuss the possibility to build and operate a time machine, a device that produces closed timelike curves (CTCs). We specify the spacetime structure needed to implement a time machine and assess attempted no-go results against time machines in ...
Wuthrich, Christian, Earman, John, Smeenk, Christopher   +2 more
core  

Do Quantum Objects Have Temporal Parts? [PDF]

, 2012
This paper provides a new context for an established metaphysical debate regarding the problem of persistence. I contend that perdurance (the claim that objects persist by having temporal parts) can be precisely formulated in quantum mechanics due to an
Pashby, Thomas, Thomas Pashby
core  

Does gravity induce wavefunction collapse? An examination of Penrose's conjecture [PDF]

, 2013
According to Penrose, the fundamental conflict between the superposition principle of quantum mechanics and the principle of general covariance of general relativity entails the existence of wavefunction collapse, e.g.
Gao, Shan, Shan Gao
core  

Renormalization group flow of f(R)-gravity [PDF]

, 2008
We use the functional renormalization group equation for quantum gravity to construct a non-perturbative flow equation for modified gravity theories of the form $S = \int d^dx \sqrt{g} f(R)$.
Afd Theoretical Physics (ITF), Saueressig, F., Machado, P.F., Dep Natuurkunde, Quantum Gravity, Strings and Elementary Particles   +4 more
core  

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

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 ...
openaire   +2 more sources

The Conformal Constraint in Canonical Quantum Gravity

, 2010
Perturbative canonical quantum gravity is considered, when coupled to a renormalizable model for matter fields. It is proposed that the functional integral over the dilaton field should be disentangled from the other integrations over the metric fields.
openaire   +2 more sources