Zobrazeno 1 - 10
of 293
pro vyhledávání: '"Giovanni Montani"'
Autor:
Sebastiano Segreto, Giovanni Montani
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 8, Pp 1-17 (2024)
Abstract We analyse a n-dimensional Generalized Uncertainty Principle (GUP) quantization framework, characterized by a non-commutative nature of the configurational variables. First, we identify a set of states which are maximally localized only alon
Externí odkaz:
https://doaj.org/article/ad21795d1c6e4c69b34c61b6432b1086
Autor:
Tiziano Schiavone, Giovanni Montani
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 5, Pp 1-23 (2024)
Abstract We analyze inhomogeneous cosmological models in the local Universe, described by the Lemaître–Tolman–Bondi (LTB) metric and developed using linear perturbation theory on a homogeneous and isotropic Universe background. Focusing on the d
Externí odkaz:
https://doaj.org/article/d9048681b5f14ae2b6cb5e285a5e1fc6
Autor:
Simone Lo Franco, Giovanni Montani
Publikováno v:
Physics Letters B, Vol 857, Iss , Pp 138983- (2024)
We 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
Externí odkaz:
https://doaj.org/article/aee9087e4d824a92857a689d463a8d56
Autor:
Gabriele Barca, Giovanni Montani
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 3, Pp 1-14 (2024)
Abstract We study the effects of cut-off physics, in the form of a modified algebra inspired by Polymer Quantum Mechanics and by the Generalized Uncertainty Principle representation, on the collapse of a spherical dust cloud. We analyze both the Newt
Externí odkaz:
https://doaj.org/article/8a4225f055bc4b679a95eb9f2ba7c612
Autor:
Nicola Bortolotti, Giovanni Montani
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 1, Pp 1-13 (2024)
Abstract We investigate the quantum dynamics of the quasi-isotropic inflationary solution. This is achieved by deriving the Lagrangian and Hamiltonian for both the FLRW background and the inhomogeneous correction, via an expansion of the Einstein–H
Externí odkaz:
https://doaj.org/article/45c8077ecaab4d78935e5c80d76a3037
Autor:
Giovanni Montani, Fabio Moretti
Publikováno v:
Symmetry, Vol 16, Iss 9, p 1111 (2024)
We construct the low-frequency formulation of the turbulence characterizing the plasma in a Tokamak edge. Under rather natural assumptions, we demonstrate that, even in the presence of poloidal magnetic fluctuations, it is possible to deal with a red
Externí odkaz:
https://doaj.org/article/6a2adcc893a445dbafbe6d53e95a610c
Autor:
Gabriele Barca, Giovanni Montani
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 8, Pp 1-1 (2024)
Externí odkaz:
https://doaj.org/article/450213572d514053b90e225ba613eb2f
Publikováno v:
Entropy, Vol 26, Iss 8, p 662 (2024)
We consider a dynamic scenario for characterizing the late Universe evolution, aiming to mitigate the Hubble tension. Specifically, we consider a metric f(R) gravity in the Jordan frame which is implemented to the dynamics of a flat isotropic Univers
Externí odkaz:
https://doaj.org/article/248f988d0fe44f76983ff717d50f4eb5
Autor:
Eleonora Giovannetti, Giovanni Montani
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 83, Iss 8, Pp 1-15 (2023)
Abstract We study the implementation of Polymer Quantum Mechanics (PQM) to a system decomposed into a quasi-classical background and a small quantum subsystem, according to the original Vilenkin proposal. We develop the whole formalism in the momentu
Externí odkaz:
https://doaj.org/article/8d63ecd143a9425193d2d434d1e5998b
Autor:
Giulia Maniccia, Giovanni Montani
Publikováno v:
Symmetry, Vol 16, Iss 7, p 816 (2024)
A precise interpretation of the universe wave function is forbidden in the spirit of the Copenhagen School since a precise notion of measure operation cannot be satisfactorily defined. Here, we propose a Bohmian interpretation of the isotropic univer
Externí odkaz:
https://doaj.org/article/40eb335d9c6742ffb3b2ce1f9a5f7816