title: Normal modes of a quasi-one-dimensional multichain complex plasma.
abstract: We studied equally charged particles, suspended in a complex plasma, which move in a plane and interact with a screened Coulomb potential (Yukawa type) and with an additional external confining parabolic potential in one direction, which makes the system quasi-one-dimensional (Q1D). The normal modes of the system are studied in the presence of dissipation. We also investigated how a perpendicular magnetic field couples the phonon modes with each other. Two different ways of exciting the normal modes are discussed: (1) a uniform excitation of the Q1D lattice, and (2) a local forced excitation of the system in which one particle is driven by, e.g., a laser. Our results are in very good agreement with recent experimental findings on a finite single chain system [Phys. Rev. Lett. 91, 255003 (2003)]]. Predictions are made for the normal modes of multichain structures in the presence of damping.
authors.affiliation: Department of Physics, University of Antwerp (Campus Drie Eiken), B-2610 Antwerpen, Belgium.
authors.forename: G
authors.initials: G
authors.lastname: Piacente
authors.forename: F M
authors.initials: FM
authors.lastname: Peeters
authors.forename: J J
authors.initials: JJ
authors.lastname: Betouras