Collective motion and effective potential in classical liquids
- 28 July 1978
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 11 (14), 2895-2905
- https://doi.org/10.1088/0022-3719/11/14/012
Abstract
The concept of collective motion in classical liquids is discussed by using a general effective potential. In doing this a self-consistent memory function method is employed to analyse the density-density correlation function. The density response function is formulated rigorously in the form of a generalised random-phase approximation. The effective potential which appears therein is investigated by using successive approximations for a memory function. It is shown that the effective potential guaranteeing sum rules of the dynamical structure factor up to the fourth give a solid-like mean field in the high-frequency limit. From the lineshape of the dynamical structure factor corresponding to frequency-dependent potentials, effects of dynamical dampings are discussed.Keywords
This publication has 36 references indexed in Scilit:
- A kinetic theory of classical simple liquidsPhysical Review A, 1975
- Dynamical current correlation functions of simple classical liquids for intermediate wave numbersPhysical Review A, 1975
- The dynamic properties of monatomic liquidsReports on Progress in Physics, 1975
- Collective motions in classical liquids. IV. Liquid rubidiumPhysical Review A, 1975
- Statistical mechanics of dense ionized matter. III. Dynamical properties of the classical one-component plasmaPhysical Review A, 1975
- Density fluctuations in liquid rubidium. I. Neutron-scattering measurementsPhysical Review A, 1974
- Generalized Hydrodynamics and Analysis of Current Correlation FunctionsPhysical Review A, 1971
- Collective motion in liquidsJournal of Physics C: Solid State Physics, 1969
- Kinetic Theory of Collective Modes in Classical LiquidsProgress of Theoretical Physics, 1969
- High frequency waves in liquid metalsAdvances in Physics, 1967