Zobrazeno 1 - 10
of 3 005
pro vyhledávání: '"Roberti, P."'
We use the spectral theory of soliton gas for the one-dimensional focusing nonlinear Schr\"odinger equation (fNLSE) to describe the statistically stationary and spatially homogeneous integrable turbulence emerging at large times from the evolution of
Externí odkaz:
http://arxiv.org/abs/2411.06922
Autor:
Roberti, Luigi, Stefanescu, Eduard
We consider a model for the Antarctic Circumpolar Current in rotating spherical coordinates. After establishing global-in-time existence and uniqueness of classical solutions, we turn our attention to the issue of stability of a class of steady zonal
Externí odkaz:
http://arxiv.org/abs/2409.17013
We study two-dimensional stationary soliton gas in the framework of the time-independent reduction of the Kadomtsev-Petviashvili (KPII) equation, which coincides with the integrable two-way ``good'' Boussinesq equation in the xy-plane. This (2+0)D re
Externí odkaz:
http://arxiv.org/abs/2408.05548
Well-posedness in time-weighted spaces for quasilinear (and semilinear) parabolic evolution equations $u'=A(u)u+f(u)$ is established in a certain critical case of strict inclusion $\mathrm{dom}(f)\subsetneq \mathrm{dom}(A)$ for the domains of the (su
Externí odkaz:
http://arxiv.org/abs/2408.05067
Autor:
Fache, Loic, Damart, Hervé, Copie, François, Bonnemain, Thibault, Congy, Thibault, Roberti, Giacomo, Suret, Pierre, El, Gennady, Randoux, Stéphane
We present an experimental study on the perturbed evolution of Korteweg-deVries soliton gases in a weakly dissipative nonlinear electrical transmission line. The system's dynamics reveal that an initially dense, fully randomized, soliton gas evolves
Externí odkaz:
http://arxiv.org/abs/2407.02874
Autor:
Brinkman, Hannah E., Roberti, Lorenzo, Kemp, Alex, Michielsen, Mathias, Tkachenko, Andrew, Aerts, Conny
Asteroseismology gives us the opportunity to look inside stars and determine their internal properties. Based on these observations, estimations can be made for the amount of the convective boundary mixing and envelope mixing of such stars, and the s
Externí odkaz:
http://arxiv.org/abs/2406.02404
Publikováno v:
A&A 686, L8 (2024)
The $\gamma$-process in core-collapse supernovae (CCSNe) can produce a number of neutron-deficient stable isotopes heavier than iron (p-nuclei). However, current model predictions do to not fully reproduce the solar abundances. We investigate the imp
Externí odkaz:
http://arxiv.org/abs/2405.07783
We use Riemann problem for soliton gas as a benchmark for a detailed numerical validation of the spectral kinetic theory for the Korteweg-de Vries (KdV) and the focusing nonlinear Schr\"odinger (fNLS) equations. We construct weak solutions to the kin
Externí odkaz:
http://arxiv.org/abs/2405.05166
We present an extension of the set of models published in Limongi & Chieffi, 2018, ApJS, 237, 13, at metallicity two times solar, i.e. [Fe/H]=0.3. The key physical properties of these models at the onset of the core collapse are mainly due to the hig
Externí odkaz:
http://arxiv.org/abs/2403.18945
Autor:
Boccioli, Luca, Roberti, Lorenzo
Publikováno v:
Universe, 10, 148 (2024)
Recent developments in multi-dimensional simulations of core-collapse supernovae have considerably improved our understanding of this complex phenomenon. In addition to that, one-dimensional (1D) studies have been employed to study the explosion mech
Externí odkaz:
http://arxiv.org/abs/2403.12942