Zobrazeno 1 - 10
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pro vyhledávání: '"Ferraris, M"'
Autor:
Fatibene, L., Orizzonte, A., Albano, A., Coriasco, S., Ferraris, M., Garruto, S., Morandi, N.
Publikováno v:
International Journal of Geometric Methods in Modern Physics (2024)
We review Holst formalism and we discuss dynamical equivalence with standard GR (in dimension 4). Holst formalism is written for a spin coframe field $e^I_\mu$ and a $Spin(3,1)$-connection $\omega^{IJ}_\mu$ on spacetime $M$ and it depends on the Hols
Externí odkaz:
http://arxiv.org/abs/2401.07307
Publikováno v:
International Journal of Geometric Methods in Modern Physics (2024)
A covariant, global, variational framework for perturbations in field theories is presented. Perturbations are obtained as vertical vector fields on the configuration bundle and they drag, exactly, solution into solutions. The flow of a perturbation
Externí odkaz:
http://arxiv.org/abs/2310.12907
We extend to three dimensions the proposal of a completely relativistic positioning system (rPS). The system does not rely on approximations, in fact, it works at a few Schwarzschild radii from a black hole, and it does not rely on Newtonian physics
Externí odkaz:
http://arxiv.org/abs/2309.00865
Publikováno v:
Eur. Phys. J. Plus 134(5) (2019)
In a Palatini $f(\mathcal{R})$-model, we define chonodynamical effects due to the choice of atomic clocks as standard reference clocks and we develop a formalism able to quantitatively separate them from the usual effective dark sources one has in ex
Externí odkaz:
http://arxiv.org/abs/1810.10754
Autor:
Smeacetto, F., Zanchi, E., Meena Narayana Menon, D., Janner, D., Lamnini, S., Salvo, M., De La Pierre, S., Javed, H., Ferraris, M.
Publikováno v:
In Ceramics International 15 November 2022 48(22):32837-32843
After reviewing the hole argument and its relations with initial value problem and general covariance, we shall discuss how much freedom one has to define the physical state of a system in a generally covariant (or gauge covariant) field theory. We s
Externí odkaz:
http://arxiv.org/abs/1605.03888
Publikováno v:
In Surface & Coatings Technology 15 March 2021 409
Autor:
Ferraris, M., De la Pierre, S. *, Sabato, A.G., Smeacetto, F., Javed, H., Walter, C., Malzbender, J.
Publikováno v:
In Journal of the European Ceramic Society September 2020 40(12):4067-4075
We shall present here a general apt technique to induce connections along bundle reductions which is different from the standard restriction. This clarifies and generalizes the standard procedure to define Barbero-Immirzi (BI) connection, though on s
Externí odkaz:
http://arxiv.org/abs/1011.2041
The ADM formalism is reviewed and techniques for decomposing generic components of metric, connection and curvature are obtained. These techniques will turn out to be enough to decompose not only Einstein equations but also covariant conservation law
Externí odkaz:
http://arxiv.org/abs/1007.4071