| Autor: |
R. Fernandez-Perea, Kenichi Kinugawa, Peter Verkerk, B. Fåk, Javier Dawidowski, M. T. Fernández-Díaz, Carlos Cabrillo, F. J. Bermejo, Stephen M. Bennington |
| Rok vydání: |
1999 |
| Předmět: |
|
| Zdroj: |
Physical review letters. 84(23) |
| ISSN: |
1079-7114 |
| Popis: |
The origin of the well-defined collective excitations found in liquid $\mathrm{para}\ensuremath{-}{\mathrm{H}}_{2}$ 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. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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