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Molecular Physics
An International Journal at the Interface Between Chemistry and Physics
Volume 109, 2011 - Issue 23-24: Special Issue in Honour of Luciano Reatto
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Original Articles

Generalized collective excitations in supercritical argon

Taras Bryk Institute for Condensed Matter Physics, National Academy of Sciences of Ukraine, 1 Svientsitskii Street, 79011 Lviv, Ukraine; Institute of Applied Mathematics and Fundamental Sciences, National Technical University of Lviv, 79013 Lviv, Ukraine
&
Giancarlo Ruocco Dipartimento di Fisica, Universita di Roma La Sapienza, I-00185, Roma, Italy; IPCF-CNR, Universita di Roma, I-00185, Roma, ItalyCorrespondence[email protected]
Pages 2929-2934 | Received 14 Jul 2011, Accepted 19 Aug 2011, Published online: 26 Oct 2011
 
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Abstract

Dispersion and damping of collective excitations in supercritical argon along the isothermal line of 280 K are studied by a combination of molecular dynamics simulations and Generalized Collective Mode (GCM) analysis. ‘Positive dispersion’ of collective excitations and its dependence on density is discussed on the basis of GCM theory of ‘positive dispersion’.

Acknowledgements

TB was partially supported by the project PHA-0107U002081.

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