Title: PROPAGATING COLLECTIVE EXCITATIONS IN MOLTEN SALTS
Author(s): T.Bryk, I.Mryglod (Institute for Condensed Matter Physics of the National Academy of Sciences of Ukraine, 1 Svientsitskii Str., 79011 Lviv, Ukraine)

Longitudinal as well as transverse dynamics of a molten salt beyond the hydrodynamic region is studied within the generalized collective modes (GCM) approach. An analytical three-variable model is applied to the treatment of the coupled long- and short-time charge fluctuations. Dispersion laws of propagating kinetic collective excitations such as optic phonon-like modes, heat and shear waves are obtained and analyzed for the case of molten NaCl within the eight-variable GCM scheme, combining the analytical methods and molecular dynamics simulations.

Key words: generalized hydrodynamics, collective excitations, ionic liquids, molten salts, longitudinal and transverse dynamics
PACS: 05.20.Jj, 61.20.Lc