From Geometry of Hamiltonian Dynamics to Topology of Phase Transitions: A Review

Autor: Giulio Pettini, Matteo Gori, Marco Pettini

Publikováno v: Entropy, Vol 26, Iss 10, p 840 (2024)

In this review work, we outline a conceptual path that, starting from the numerical investigation of the transition between weak chaos and strong chaos in Hamiltonian systems with many degrees of freedom, comes to highlight how, at the basis of equil

Externí odkaz: https://doaj.org/article/a24a35ff5e7b4c02b6abdf02f0308224

Energy transfer to the phonons of a macromolecule through light pumping

Autor: Elham Faraji, Roberto Franzosi, Stefano Mancini, Marco Pettini

Publikováno v: Scientific Reports, Vol 11, Iss 1, Pp 1-14 (2021)

Abstract In the present paper we address the problem of the energy downconversion of the light absorbed by a protein into its internal vibrational modes. We consider the case in which the light receptors are fluorophores either naturally co-expressed

Externí odkaz: https://doaj.org/article/d80f529d19884fdd8d6068a832b468b8

Out-of-Equilibrium Collective Oscillation as Phonon Condensation in a Model Protein

Autor: Ilaria Nardecchia, Jeremie Torres, Mathias Lechelon, Valeria Giliberti, Michele Ortolani, Philippe Nouvel, Matteo Gori, Yoann Meriguet, Irene Donato, Jordane Preto, Luca Varani, James Sturgis, Marco Pettini

Publikováno v: Physical Review X, Vol 8, Iss 3, p 031061 (2018)

We describe the activation of out-of-equilibrium collective oscillations of a macromolecule as a classical phonon condensation phenomenon. If a macromolecule is modeled as an open system—that is, it is subjected to an external energy supply and is

Externí odkaz: https://doaj.org/article/4d0de9da12d04cf0a3f9e2c86490d39c

Topological origin of the protein folding transition

Autor: Loris Di Cairano, Riccardo Capelli, Ghofrane Bel-Hadj-Aissa, Marco Pettini

Publikováno v: Physical review / E 106(5), 054134 (2022). doi:10.1103/PhysRevE.106.054134
Physical Review E
Physical Review E, 2022, 106 (5), pp.054134. ⟨10.1103/PhysRevE.106.054134⟩

International audience; In this paper, a geometrical and thermodynamical analysis of the global properties of the potential energy landscape of a minimalistic model of a polypeptide is presented. The global geometry of the potential energy landscape

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d567c1c777ea45ceba6bbceb46a2f112
https://hdl.handle.net/2128/32606

Topology and Phase Transitions: A First Analytical Step towards the Definition of Sufficient Conditions

Autor: Marco Pettini, Matteo Gori, Loris Di Cairano

Publikováno v: Entropy 23(11), 1414-(2021). doi:10.3390/e23111414
Entropy : an international and interdisciplinary journal of entropy and information studies 23(11), 1414 (2021). doi:10.3390/e23111414 special issue: "Special Issue "The Ubiquity of Entropy II" / Special Issue Editor: Dr. Roberto Franzosi, Guest Editor"
Entropy
Entropy, 2021, 23 (11), pp.1414. ⟨10.3390/e23111414⟩
Volume 23
Issue 11
Entropy, Vol 23, Iss 1414, p 1414 (2021)

Different arguments led to supposing that the deep origin of phase transitions has to be identified with suitable topological changes of potential related submanifolds of configuration space of a physical system. An important step forward for this ap

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d18445d099478f70a56d38105d70e4b6
http://orbilu.uni.lu/handle/10993/50206