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 |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | 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 |
| ISSN: | 2469-9969 2469-9950 |
| DOI: | 10.1103/physrevb.104.174204 |
| Popis: | 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 quantum fluid are compared, on an absolute scale, with those obtained by three different quantum simulation methods such as ring polymer molecular dynamics and two versions of the Feynman-Kleinert approach. The experimental data can be well described by dynamical models typically used for liquids. Some discrepancies show up both among simulations, and between simulations and experimental data. Such discrepancies are found to mainly concern the damping of the propagating sound modes. |
| Databáze: | OpenAIRE |
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