Zobrazeno 1 - 10
of 159
pro vyhledávání: '"Carlevaro, Nakia"'
We discuss an evolutionary dark energy model, based on the presence of non-equilibrium effects on the dark energy constituents, which are described via a bulk viscosity contribution. We implement the proposed dynamics by the analysis of the 40-bins T
Externí odkaz:
http://arxiv.org/abs/2411.07060
A reduced 1D model describing the non-linear hybrid LIGKA/HAGIS simulations was developed and successfully tested in [Carlevaro et al. PPCF 64, 035010 (2022)] addressing the ITER 15MA baseline scenario. In this paper, we introduce a detailed phase-sp
Externí odkaz:
http://arxiv.org/abs/2409.12644
We analyze the transport properties of the two-dimensional electrostatic turbulence characterizing the edge of a Tokamak device from the study of test particles motion (passive fluid tracers) following the EXB drift. We perform statistical tests on t
Externí odkaz:
http://arxiv.org/abs/2407.18634
Publikováno v:
Entropy 26, 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 Unive
Externí odkaz:
http://arxiv.org/abs/2407.12409
We analyze a model for Dark Energy - Dark Matter interaction, based on a decaying process of the former into the latter. The dynamical equations are constructed following a kinetic formulation, which separates the interacting fluctuations from an equ
Externí odkaz:
http://arxiv.org/abs/2404.15977
Autor:
Montani, Giovanni, Carlevaro, Nakia
Publikováno v:
Symmetry 16, 306 (2024)
We present a new perspective on the symmetries that govern the formation of large-scale structures across the Universe, particularly focusing on the transition from the seeds of galaxy clusters to the seeds of galaxies themselves. We address two main
Externí odkaz:
http://arxiv.org/abs/2403.18759
Publikováno v:
Phys. Dark Univ. 44, 101486 (2024)
We construct a theoretical framework to interpret the Hubble tension by means of a slow-rolling dynamics of a self-interacting scalar field. In particular, we split the Friedmann equation in order to construct a system for the three unknowns, corresp
Externí odkaz:
http://arxiv.org/abs/2311.04822
Publikováno v:
Symmetry 15, 1745 (2023)
The plasma edge of a tokamak configuration is characterized by turbulent dynamics leading to enhanced transport. We construct a simplified 3D Hasegawa--Wakatani model reducing to a single partial differential equation for the turbulent electric poten
Externí odkaz:
http://arxiv.org/abs/2309.06078
Publikováno v:
Mon.Not.Roy.Astron.Soc. Letters 527 (2024) 1, L156-L161
We introduce a theoretical framework to interpret the Hubble tension, based on the combination of a metric $f(R)$ gravity with a dynamical dark energy contribution. The modified gravity provides the non-minimally coupled scalar field responsible for
Externí odkaz:
http://arxiv.org/abs/2306.11101
Autor:
Montani, Giovanni, Carlevaro, Nakia
Publikováno v:
Physica D 451, 133774 (2023)
We derive a reduced model for the electrostatic turbulence in a Tokamak edge, when dealing with a resistive plasma and neglecting the spatial gradient of the background density which triggers the linear drift wave response. The obtained dynamics, de
Externí odkaz:
http://arxiv.org/abs/2302.06480