Zobrazeno 1 - 10
of 153
pro vyhledávání: '"Scardigli, Fabio"'
In this paper we study the Oppenheimer-Snyder (OS) gravitational collapse in the general framework of scale-dependent gravity. We explore the collapse in spherically symmetric solutions suggested both by asymptotically safe gravity (positive $\om$-pa
Externí odkaz:
http://arxiv.org/abs/2410.15904
Autor:
Krommydas, Dimitrios, Scardigli, Fabio
In this paper we present phenomenological evidence for the validity of an exponential distance relation (also known as generalized Titius-Bode law) in the 32 planetary systems (31 extra solar plus our Solar System) containing at least 5 planets or mo
Externí odkaz:
http://arxiv.org/abs/2307.06070
Autor:
Scardigli, Fabio
Publikováno v:
"Eternity between Space and Time", De Gruyter (Berlin), 2024
We give a pedagogical introduction to the generalized uncertainty principle (GUP), by showing how it naturally emerges when the action of gravity is taken into account in measurement processes. We review some physical predictions of the GUP. In parti
Externí odkaz:
http://arxiv.org/abs/2212.13776
The notions of minimum geometrical length and minimum length scale are discussed with reference to correlation functions obtained from in-in and in-out amplitudes in quantum field theory. Whereas the in-in propagator for metric perturbations does not
Externí odkaz:
http://arxiv.org/abs/2210.12801
Autor:
Scardigli, Fabio, Lambiase, Gaetano
Scale dependence of fundamental physical parameters is a generic feature of ordinary quantum field theory. When applied to gravity, this idea produces effective actions generically containing a running Newtonian coupling constant, from which new (sph
Externí odkaz:
http://arxiv.org/abs/2205.07088
Autor:
Lambiase, Gaetano, Scardigli, Fabio
We present a procedure to link the deformation parameter $\beta$ of the generalized uncertainty principle (GUP) to the two free parameters $\om$ and $\gamma$ of the running Newtonian coupling constant of the Asymptotic Safe gravity (ASG) program. To
Externí odkaz:
http://arxiv.org/abs/2204.07416
Publikováno v:
Phys.Lett.B 824 (2022) 136818
The non zero value of Planck constant $h$ underlies the emergence of several inequalities that must be satisfied in the quantum realm, the most prominent one being Heisenberg Uncertainty Principle. Among these inequalities, Bekenstein bound provides
Externí odkaz:
http://arxiv.org/abs/2009.12530
Autor:
Blasone, Massimo, Lambiase, Gaetano, Luciano, Giuseppe Gaetano, Petruzziello, Luciano, Scardigli, Fabio
We propose a heuristic derivation of Casimir effect in the context of minimal length theories based on a Generalized Uncertainty Principle (GUP). By considering a GUP with only a quadratic term in the momentum, we compute corrections to the standard
Externí odkaz:
http://arxiv.org/abs/1912.00241
Publikováno v:
Phys. Rev. D 101, 105002 (2020)
We investigate the structure of the gravity-induced Generalized Uncertainty Principle in three dimensions. The subtleties of lower dimensional gravity, and its important differences with respect to four and higher dimensions, are duly taken into acco
Externí odkaz:
http://arxiv.org/abs/1910.09019