Year: 2016
Type: article
Abstract: The collective modes of a familiar two-dimensional one-component-plasma with the repulsive logarithmic interaction between the particles are analysed using the quasi-crystalline approximation (QCA) combined with the molecular dynamic simulation of the equilibrium structural properties. It is found that the dispersion curves in the strongly coupled regime are virtually independent of the coupling strength. Arguments based on the excluded volume consideration for the radial distribution function allow us to derive very simple expressions for the dispersion relations, which show excellent agreement with the exact QCA dispersion over the entire domain of wavelengths. Comparison with the results of the conventional fluid analysis is performed, and the difference is explained.
Source: Physics of Plasmas
DOI: 10.1063/1.4950829
Authors: Sergey A. Khrapak, Boris A. Klumov, Alexey G. Khrapak
Institutions: Centre National de la Recherche Scientifique, Russian Academy of Sciences, Aix-Marseille Université, Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR), Physique des interactions ioniques et moléculaires, Joint Institute for High Temperatures, Landau Institute for Theoretical Physics
Language: English
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2394631330