Zobrazeno 1 - 10 of 135 pro vyhledávání: '"Fabrizio Barocchi"'
1
Collective dynamics of liquid deuterium: Neutron scattering and approximate quantum simulation methods
Autor: Alessandro Cunsolo, Renato Magli, Ubaldo Bafile, Milva Celli, Fabrizio Barocchi, Eleonora Guarini, Martin Neumann, Ferdinando Formisano, Daniele Colognesi, A. Laloni, Alessio De Francesco
Publikováno v: Physical Review B 104 (2021). doi:10.1103/PhysRevB.104.174204
info:cnr-pdr/source/autori:Eleonora Guarini, Fabrizio Barocchi, Alessio De Francesco, Ferdinando Formisano, Alessio Laloni, Ubaldo Bafile, Milva Celli, Daniele Colognesi, Renato Magli, Alessandro Cunsolo, Martin Neumann./titolo:Collective dynamics of liquid deuterium: Neutron scattering and approximate quantum simulation methods/doi:10.1103%2FPhysRevB.104.174204/rivista:Physical Review B/anno:2021/pagina_da:/pagina_a:/intervallo_pagine:/volume:104
We present an experimental and simulation study of the collective dynamics of liquid D2 in the range of exchanged wave vectors 3< Q< 14 nm-1. Neutron Brillouin scattering results for the center-of-mass dynamic structure factor of this moderately quan
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::34f37e48c11870b1420bd14c9df969e9
https://doi.org/10.1103/physrevb.104.174204
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2
Universal Matsubara time decay of quantum autocorrelations for Boltzmann particles
Autor: Fabrizio Barocchi, Eleonora Guarini
Publikováno v: Physical review. E. 106(4-1)
The general properties of time dependent autocorrelations in many-body quantum systems are here analyzed at thermodynamic equilibrium in the Boltzmann canonical ensemble at temperature T, by means of the exponential expansion theory (EET). It is show
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c9e24617da904a9f0cfdecf045e4fad1
https://pubmed.ncbi.nlm.nih.gov/36397547
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3
Neutron Brillouin scattering and ab initio simulation study of the collective dynamics of liquid silver
Autor: D. J. González, Beatriz G. del Rio, A. Laloni, Alessio De Francesco, Ubaldo Bafile, Ferdinando Formisano, Luis E. González, Eleonora Guarini, Fabrizio Barocchi
Publikováno v: Physical Review B 102 (2020): 054210-1–054210-19. doi:10.1103/PhysRevB.102.054210
info:cnr-pdr/source/autori:Eleonora Guarini (1), Alessio De Francesco (2), Ubaldo Bafile (3), Alessio Laloni (4), Beatriz G. del Rio (5), David J. González (5), Luis E. González (5), Fabrizio Barocchi (1), Ferdinando Formisano (2)/titolo:Neutron Brillouin scattering and ab initio simulation study of the collective dynamics of liquid silver/doi:10.1103%2FPhysRevB.102.054210/rivista:Physical Review B/anno:2020/pagina_da:054210-1/pagina_a:054210-19/intervallo_pagine:054210-1–054210-19/volume:102
UVaDOC. Repositorio Documental de la Universidad de Valladolid
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We present a thorough investigation of the collective dynamics of liquid Ag combining neutron Brillouin scattering and ab initio molecular dynamics (AIMD) determinations of the dynamic structure factor S(Q,ω). The main s
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8d1909f879b2201039a9a004cd61f417
https://publications.cnr.it/doc/430144
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4
A new approach to the density of states of a liquid gives insight into its collective dynamics
Autor: Eleonora Guarini (1), Stefano Bellissima (2), Ubaldo Bafile (2), Emmanuel Farhi (3), Alessio De Francesco (4), Ferdinando Formisano (4), Fabrizio Barocchi (1)
Publikováno v: FisMat 2017, Italian National Conference on the Physics of Matter (including Optics, Photonics, Liquids, Soft Matter), Trieste, 1-5 ottobre 2017
info:cnr-pdr/source/autori:Eleonora Guarini (1), Stefano Bellissima (2), Ubaldo Bafile (2), Emmanuel Farhi (3), Alessio De Francesco (4), Ferdinando Formisano (4), Fabrizio Barocchi (1)/congresso_nome:FisMat 2017, Italian National Conference on the Physics of Matter (including Optics, Photonics, Liquids, Soft Matter)/congresso_luogo:Trieste/congresso_data:1-5 ottobre 2017/anno:2017/pagina_da:/pagina_a:/intervallo_pagine
Very recent papers about the self dynamics of Lennard-Jones model fluids clearly demonstrated that the properties of the spectrum Z(w) of the velocity autocorrelation function (VAF) fully justify the identification of Z(w) with the density of states
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=cnr_________::b3779764282ad37a3296cdb8f92bf5f6
https://publications.cnr.it/doc/403591
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5
Spectral modes from the expansion in Lorentzian lines: the case of spectra of current autocorrelations
Autor: Ubaldo Bafile (1), Fabrizio Barocchi (2), Stefano Bellissima (2), Eleonora Guarini (2)
Publikováno v: 2nd International Workshop on Brillouin Scattering, Brillouin And Neutrons: Assessing New Advances, pp. 31, Sapienza Università di Roma, Physics Department, 3-5/02/2016
info:cnr-pdr/source/autori:Ubaldo Bafile (1); Fabrizio Barocchi (2); Stefano Bellissima (2); Eleonora Guarini (2)/congresso_nome:2nd International Workshop on Brillouin Scattering, Brillouin And Neutrons: Assessing New Advances/congresso_luogo:Sapienza Università di Roma, Physics Department/congresso_data:3-5%2F02%2F2016/anno:2016/pagina_da:31/pagina_a:/intervallo_pagine:31
The general theory of exponential expansion of time correlation functions in many-body statistical mechanics [1] has a very simple but remarkable consequence for the second derivative of a time correlation function a(t). The frequency spectrum of a(t
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=cnr_________::4bde1d3eb8a73965b2b215f556bde38d
https://publications.cnr.it/doc/352600
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6
The density of states from mode expansion of the self dynamic structure factor of a liquid metal
Autor: Ferdinando Formisano, A. De Francesco, Emmanuel Farhi, Eleonora Guarini, Fabrizio Barocchi, Stefano Bellissima, Ubaldo Bafile
Publikováno v: Physical review. E, Statistical, nonlinear, and soft matter physics
95 (2017): 012141-1–012141-10. doi:10.1103/PhysRevE.95.012141
info:cnr-pdr/source/autori:E. Guarini, S. Bellissima, U. Bafile, E. Farhi, A. De Francesco, F. Formisano, F. Barocchi/titolo:The density of states from mode expansion of the self dynamic structure factor of a liquid metal/doi:10.1103%2FPhysRevE.95.012141/rivista:Physical review. E, Statistical, nonlinear, and soft matter physics (Print)/anno:2017/pagina_da:012141-1/pagina_a:012141-10/intervallo_pagine:012141-1–012141-10/volume:95
We show that by exploiting multi-Lorentzian fits of the self-dynamic structure factor at various wave vectors it is possible to carefully perform the Q→0 extrapolation required to determine the spectrum Z(ω) of the velocity autocorrelation functio
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e701b17a74815a273ca077874e5a72e5
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7
A high-flux upgrade for the BRISP spectrometer at ILL
Autor: A. De Francesco, Francesco Sacchetti, Alessandro Paciaroni, Wolf Christian Pilgrim, Caterina Petrillo, Andrea Orecchini, A. Laloni, Ferdinando Formisano, Marco Zanatta, Eleonora Guarini, Jens-Boie Suck, Emmanuel Farhi, Fabrizio Barocchi
Publikováno v: Review of scientific instruments 88 (2017): 053905. doi:10.1063/1.4983572
info:cnr-pdr/source/autori:M. Zanatta, F. Barocchi, A. De Francesco, E. Farhi, F. Formisano, E. Guarini, A. Laloni, A. Orecchini, A. Paciaroni, C. Petrillo, W.-C. Pilgrim, J.-B. Suck, F. Sacchetti/titolo:A high-flux upgrade for the BRISP spectrometer at ILL/doi:10.1063%2F1.4983572/rivista:Review of scientific instruments/anno:2017/pagina_da:053905/pagina_a:/intervallo_pagine:053905/volume:88
To date, the BRISP spectrometer represents the state-of-the-art for every instrument aiming to perform Brillouin neutron scattering. Exploiting accurate ray-tracing McStas simulations, we investigate an improved configuration of the BRISP primary spe
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f7693b5161805730723a4c15e14490d3
http://hdl.handle.net/11562/962660
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8
Density and time scaling effects on the velocity autocorrelation function of quantum and classical dense fluid para-hydrogen
Autor: Ubaldo Bafile, Fabrizio Barocchi, Martin Neumann, Stefano Bellissima, Eleonora Guarini, Daniele Colognesi
Publikováno v: The Journal of Chemical Physics. 150:074502
We report the results of a ring polymer molecular dynamics study of the Kubo velocity autocorrelation function of a quantum fluid as para-hydrogen aimed at the comparison with its classical counterpart. Quite different density conditions were conside
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b5c05252dccad9dbb060dadde6829d1a
https://doi.org/10.1063/1.5085202
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9
Density of states and dynamical crossover in a dense fluid revealed by exponential mode analysis of the velocity autocorrelation function
Autor: Ubaldo Bafile, Martin Neumann, Eleonora Guarini, Stefano Bellissima, Fabrizio Barocchi
Publikováno v: Physical review. E, Statistical, nonlinear, and soft matter physics
95 (2017): 012108-1–012108-14. doi:10.1103/PhysRevE.95.012108
info:cnr-pdr/source/autori:S. Bellissima (1), M. Neumann (2), E. Guarini (1), U. Bafile (3), F. Barocchi (1)/titolo:Density of states and dynamical crossover in a dense fluid revealed by exponential mode analysis of the velocity autocorrelation function/doi:10.1103%2FPhysRevE.95.012108/rivista:Physical review. E, Statistical, nonlinear, and soft matter physics (Print)/anno:2017/pagina_da:012108-1/pagina_a:012108-14/intervallo_pagine:012108-1–012108-14/volume:95
Extending a preceding study of the velocity autocorrelation function (VAF) in a simulated Lennard-Jones fluid [Phys. Rev. E 92, 042166 (2015)PLEEE81539-375510.1103/PhysRevE.92.042166] to cover higher-density and lower-temperature states, we show that
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c3671e95d31125162ca39db728cceb68
https://pubmed.ncbi.nlm.nih.gov/28208443
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10
Time dependence of the velocity autocorrelation function of a fluid: An eigenmode analysis of dynamical processes
Autor: Stefano Bellissima, Martin Neumann, Eleonora Guarini, Fabrizio Barocchi, Ubaldo Bafile
Publikováno v: Physical review. E, Statistical, nonlinear, and soft matter physics
92 (2015): 042166-1–042166-8. doi:10.1103/PhysRevE.92.042166
info:cnr-pdr/source/autori:S. Bellissima (1); M. Neumann (2); E. Guarini (1); U. Bafile (3); F. Barocchi (1)/titolo:Time dependence of the velocity autocorrelation function of a fluid: An eigenmode analysis of dynamical processes/doi:10.1103%2FPhysRevE.92.042166/rivista:Physical review. E, Statistical, nonlinear, and soft matter physics (Print)/anno:2015/pagina_da:042166-1/pagina_a:042166-8/intervallo_pagine:042166-1–042166-8/volume:92
The velocity autocorrelation function (VAF), a key quantity in the atomic-scale dynamics of fluids, has been the first paradigmatic example of a long-time tail phenomenon, and much work has been devoted to detecting such long-lasting correlations and
Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a1d4fe6e770915375683d552d77d220c
https://doi.org/10.1103/physreve.92.042166
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