Zobrazeno 1 - 10
of 36
pro vyhledávání: '"Roberto Gangemi"'
In Statistical Mechanics, Tsallis distributions were apparently conceived in connection with systems presenting long--range interactions. In fact, they were observed in numerical computations for models of such a type, as occurring in the approach to
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::90cab6106c441574071109b74b621808
http://hdl.handle.net/11379/529136
http://hdl.handle.net/11379/529136
The H 2 + ion is the simplest example in which a chemical bond exists, created by one electron between two protons. As all chemical bonds, it is usually considered inexplicable in a classical frame. Here, in view of the extremely large velocities att
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1414d8b9dbcdabab1044b15af6c9f588
http://hdl.handle.net/11379/532019
http://hdl.handle.net/11379/532019
Publikováno v:
Physica A: Statistical Mechanics and its Applications. 586:126463
We investigate the thermal fluctuations of the ionic motions in a Born model of ionic crystals, namely, a model in which the electrons are eliminated, being replaced by suitable effective potentials among the ions. The model is studied in its classic
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::78d36ca3224e422554289e30dbe8fdf2
https://doi.org/10.1016/j.physa.2021.126463
https://doi.org/10.1016/j.physa.2021.126463
It is well known that Gibbs’ statistical mechanics is not justified for systems presenting long-range interactions, such as plasmas or galaxies. In a previous work we considered a realistic FPU-like model of an ionic crystal (and thus with long-ran
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::815eed84dad08b15c3e37aaa6bceea08
http://hdl.handle.net/11379/521982
http://hdl.handle.net/11379/521982
Publikováno v:
Regular and Chaotic Dynamics. 21:660-664
A review is given of the studies aimed at extending to the thermodynamic limit stability results of Nekhoroshev type for nearly integrable Hamiltonian systems. The physical relevance of such an extension, i. e., of proving the persistence of regular
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e54c0b185c43d0eb07a8f718baef96bd
https://doi.org/10.1134/s156035471606006x
https://doi.org/10.1134/s156035471606006x
It was recently shown that the experimental infrared spectra of ionic crystals at room temperature are very well reproduced by classical realistic models, and here new results are reported on the temperature dependence of the spectra, for the LiF cry
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1406f4a50c0e6eaca34d00383ca4f73f
http://arxiv.org/abs/1804.00438
http://arxiv.org/abs/1804.00438
We give a review of the Fermi–Pasta–Ulam (FPU) problem from the perspective of its possible impact on the foundations of physics, concerning the relations between classical and quantum mechanics. In the first part we point out that the problem sh
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e2ab95b7972e1c93d449e7879d07b886
http://hdl.handle.net/10281/349983
http://hdl.handle.net/10281/349983
This paper is concerned with theoretical estimates of the refractive--index curves for quartz, obtained by the Kubo formul\ae\ in the classical approximation, through MD simulations for the motions of the ions. Two objectives are considered. The firs
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c5668cfcca8d029929032d6905d11281
http://hdl.handle.net/11379/488097
http://hdl.handle.net/11379/488097
Autor:
Giovanna Longhi, Angela Ruggirello, Sergio Abbate, Roberto Gangemi, Vincenzo Turco Liveri, Marco Passarello
Publikováno v:
Vibrational Spectroscopy. 60:54-62
The FT-IR and vibrational circular dichroism (VCD) spectra of ( S )- and -( R )-methyl lactate have been recorded for neat samples and at various concentrations in CCl 4 and DMSO solutions. These spectra are used to analyse the FT-IR and VCD spectra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f2ec49fad6a45fa0c54dee6d103cbf56
https://doi.org/10.1016/j.vibspec.2012.01.020
https://doi.org/10.1016/j.vibspec.2012.01.020
Autor:
Sergio Abbate, France Lebon, Susan Lepri, Giovanna Longhi, Roberto Gangemi, Sara Spizzichino, Gianfranco Bellachioma, Renzo Ruzziconi
Publikováno v:
ChemPhysChem. 12:3519-3523
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::43d5ffbfce18637d98ec327edb0ea70f
https://doi.org/10.1002/cphc.201100551
https://doi.org/10.1002/cphc.201100551