Quantum Effects on Liquid Dynamics as Evidenced by the Presence of Well-Defined Collective Excitations in Liquidpara-Hydrogen | Zendy

F. J. Bermejo | Zendy; Kenichi Kinugawa | Zendy; C. Cabrillo | Zendy; Stephen M. Bennington | Zendy; B. Fåk | Zendy; M. T. FernándezDíaz | Zendy; P. Verkerk | Zendy; J. Dawidowski | Zendy; R. Fernández-Perea | Zendy

Open Access

Quantum Effects on Liquid Dynamics as Evidenced by the Presence of Well-Defined Collective Excitations in Liquidpara-Hydrogen

Author(s) -

F. J. Bermejo,

Kenichi Kinugawa,

C. Cabrillo,

Stephen M. Bennington,

B. Fåk,

M. T. FernándezDíaz,

P. Verkerk,

J. Dawidowski,

R. Fernández-Perea

Publication year - 2000

Publication title -

physical review letters

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 3.688

H-Index - 673

eISSN - 1079-7114

pISSN - 0031-9007

DOI - 10.1103/physrevlett.84.5359

Subject(s) - quasiparticle , physics , dynamics (music) , quantum , limit (mathematics) , liquid hydrogen , simple (philosophy) , molecular dynamics , statistical physics , hydrogen , quantum mechanics , mathematical analysis , philosophy , superconductivity , mathematics , epistemology , acoustics

The origin of the well-defined collective excitations found in liquid para-H2 by recent experiments is investigated. The persistence of their relatively long lifetimes down to microscopic scales is well accounted for by calculations carried out by means of path-integral-centroid molecular dynamics. In contrast only overdamped excitations are found in calculations carried within the classical limit. The results provide fully quantitative evidence of quantum effects on the dynamics of a simple liquid.

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