Zobrazeno 1 - 10
of 1 808
pro vyhledávání: '"P Mantica"'
We derive the analog of the Tolman-Oppenheimer-Volkoff equation in conformal Killing gravity in a static spherically symmetric spacetime, sourced by perfect fluid matter. It differs from the original by `dark terms' associated to the conformal Killin
Externí odkaz:
http://arxiv.org/abs/2409.18663
Autor:
Mantica, Giorgio
Publikováno v:
Entropy 2023, 25(7), 1004
I study the scaling behavior in the physical parameters of dynamical entropies, classical and quantum, in a specifically devised model of collision-induced decoherence in a chaotic system. The treatment is fully canonical and no approximations are in
Externí odkaz:
http://arxiv.org/abs/2407.11587
Autor:
Mantica, Giorgio
Publikováno v:
Entropy 2024, 26(7), 572
The multi-particle Arnol'd cat is a generalization of the Hamiltonian system, both classical and quantum, whose period evolution operator is the renown map that bears its name. It is obtained following the Joos-Zeh prescription for decoherence, by ad
Externí odkaz:
http://arxiv.org/abs/2407.11583
Publikováno v:
Physical Review D 110, 044025 (2024)
We identify an anisotropic divergence-free conformal Killing tensor $K_{jl}$ for static spherically symmetric spacetimes, and write the conformal Killing gravity equations as Einstein equations augmented by this tensor. The field equations are of sec
Externí odkaz:
http://arxiv.org/abs/2406.12511
Publikováno v:
Physical Review D 110, 064041 (2024)
We introduce Sinyukov-like tensors, a special kind of conformal Killing tensors. In Robertson-Walker space-times they have the perfect-fluid form and only depend on two constants and the scale factor. They are the candidate for the dark term of the n
Externí odkaz:
http://arxiv.org/abs/2404.11468
Clement and Noiucer submitted a note {\tt arXiv:2401.16008 [gr-qc]} replying to our criticism {\tt arXiv:2401.10479 [gr-qc]} of their previous submission. We reply to the contents of this note and remark that these authors have not addressed our argu
Externí odkaz:
http://arxiv.org/abs/2402.01992
We address in this article the criticism in a recently submitted article by Clement and Noiucer (arXiv:2312.17662 [gr-qc]) on "Cotton Gravity" (CG), a gravity theory alternative to General Relativity. These authors claim that CG is "not predictive" f
Externí odkaz:
http://arxiv.org/abs/2401.10479
Publikováno v:
Phys. Rev. D 109, 044059 (2024)
The Friedmann equations of Cotton gravity provide a simple parametrization to reproduce, by tuning a single function, the Friedmann equations of several extensions of gravity, such as f(R), modified Gauss-Bonnet f(G), teleparallel f(T), and more. It
Externí odkaz:
http://arxiv.org/abs/2312.02784
Publikováno v:
Research and Reports in Urology, Vol Volume 16, Pp 273-282 (2024)
Loris Cacciatore,1 Angelo Territo,2 Antonio Minore,1 Antonio Testa,1 Guglielmo Mantica,3 Francesco Esperto1 1Department of Urology, Fondazione Policlinico Universitario Campus Bio-Medico Di Roma, Rome, Italy; 2Department of Urology, Fundació Puigver
Externí odkaz:
https://doaj.org/article/fd1df5f8d771468a8d0009db610cd002
Publikováno v:
Phys. Rev. D 108, 124029 (2023)
We show that "Gravity at cosmological distances: Explaining the accelerating expansion without dark energy" recently proposed by J. Harada [6] is equivalent to the Einstein equation extended by the presence of an arbitrary conformal Killing tensor. T
Externí odkaz:
http://arxiv.org/abs/2308.06803