Zobrazeno 1 - 10
of 29
pro vyhledávání: '"Antonio Ponno"'
Autor:
Giancarlo Benettin, Antonio Ponno
Publikováno v:
Mathematics in Engineering, Vol 3, Iss 3, Pp 1-22 (2021)
Many papers investigated, in a variety of ways, the so-called "FPU state" in the Fermi-Pasta-Ulam model, namely the state, intermediate between the initial state and equipartition, that the system soon reaches if initially one or a few long-wavelengt
Externí odkaz:
https://doaj.org/article/3ca444f222be45069afc043007000ae5
Autor:
Dario Bambusi, Antonio Ponno
Publikováno v:
Journal of Mathematics in Industry, Vol 10, Iss 1, Pp 1-7 (2020)
Abstract We propose a mechanism explaining the approximately linear growth of Covid19 world total cases as well as the slow linear decrease of the daily new cases (and daily deaths) observed (in average) in USA and Italy. In our explanation, we regar
Externí odkaz:
https://doaj.org/article/72baa8029eca4e75b46d85ef5d585899
Autor:
Giancarlo Benettin, Antonio Ponno
Publikováno v:
Springer INdAM Series ISBN: 9789811964619
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fd6def10946c4ca0bf5319de913aa178
https://hdl.handle.net/11577/3473879
https://hdl.handle.net/11577/3473879
Autor:
Matteo Gallone, Antonio Ponno
Publikováno v:
Springer INdAM Series ISBN: 9789811964336
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f918aa777d221a7a14888f4520a553d1
https://hdl.handle.net/11577/3473878
https://hdl.handle.net/11577/3473878
We prove analytically and show numerically that the dynamics of the Fermi-Pasta-Ulam-Tsingou chain is characterised by a transient Burgers turbulence regime on a wide range of time and energy scales. This regime is present at long wavelengths and ene
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a94048f2c38557198bc1b1819eb9d53f
Publikováno v:
Grava, T, Maspero, A, Mazzuca, G & Ponno, A 2020, ' Adiabatic Invariants for the FPUT and Toda Chain in the Thermodynamic Limit ', Communications in Mathematical Physics, vol. 380, pp. 811–851 . https://doi.org/10.1007/s00220-020-03866-2
We consider the Fermi-Pasta-Ulam-Tsingou (FPUT) chain composed by $N \gg 1$ particles and periodic boundary conditions, and endow the phase space with the Gibbs measure at small temperature $\beta^{-1}$. Given a fixed ${1\leq m \ll N}$, we prove that
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::317f742421ba90ac713df4ee55c43d94
http://arxiv.org/abs/2001.08070
http://arxiv.org/abs/2001.08070
Autor:
Antonio Ponno, Dario Bambusi
Publikováno v:
Journal of Mathematics in Industry, Vol 10, Iss 1, Pp 1-7 (2020)
Journal of Mathematics in Industry
Journal of Mathematics in Industry
We propose a mechanism explaining the approximately linear growth of Covid19 world total cases as well as the slow linear decrease of the daily new cases (and daily deaths) observed (in average) in USA and Italy. In our explanation, we regard a given
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c685911ba5093e87842a941b04bcb740
http://hdl.handle.net/11577/3363969
http://hdl.handle.net/11577/3363969
FPU models, in dimension one, are perturbations either of the linear model or of the Toda model; perturbations of the linear model include the usual $$\beta $$ -model, perturbations of Toda include the usual $$\alpha +\beta $$ model. In this paper we
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::23063d9dd84591c69cb32d3241165507
http://hdl.handle.net/11577/3269952
http://hdl.handle.net/11577/3269952
Autor:
Andrea Carati, Antonio Ponno
We study, both numerically and analytically, the time needed to observe the breaking of an FPU $$\alpha $$ -chain in two or more pieces, starting from an unbroken configuration at a given temperature. It is found that such a “chopping” time is gi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::86354d7a14bec43f1f115bb0ee1b899b
http://hdl.handle.net/11577/3266616
http://hdl.handle.net/11577/3266616
Publikováno v:
Journal of Statistical Physics. 152:195-212
This paper is devoted to a numerical study of the familiar α+β FPU model. Precisely, we here discuss, revisit and combine together two main ideas on the subject: (i) In the system, at small specific energy e=E/N, two well separated time-scales are