https://doi.org/10.1140/epjb/e2003-00027-5
Light scattering by longitudinal acoustic modes in supercooled molecular liquids II: microscopic derivation of the phenomenological equations
1
Hahn-Meitner Institut, Glienicker Strasse 100, 14109 Berlin, Germany
2
Technische Universität Chemnitz, 09107 Chemnitz, Germany
3
UFR 925, UPMC, Paris, France
Corresponding author: a franosch@hmi.de
Received:
14
August
2002
Published online:
4
February
2003
The constitutive equations for the orientational dynamics of a liquid formed of linear molecules are derived microscopically. The resulting generalised Langevin equations coincide with the phenomenological approach of Dreyfus et al. [1]. Formally exact expressions are given for the phenomenological coefficients and various constraints are shown to be consequences of this microscopic approach.
PACS: 64.70.Pf – Glass transitions / 78.35.+c – Brillouin and Rayleigh scattering; other light scattering / 61.25.Em – Molecular liquids
© EDP Sciences, Società Italiana di Fisica, Springer-Verlag, 2003
