Normal modes of a quasi-one-dimensional multichain complex plasma

G. Piacente, F.M. Peeters, Joseph Betouras

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18 Citations (Scopus)


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 [Liu et al., Phys. Rev. Lett. 91, 255003 (2003)]. Predictions are made for the normal modes of multichain structures in the presence of damping.
Original languageEnglish
Article number036406
JournalPhysical Review. E, Statistical, nonlinear, and soft matter physics
Issue number3 part 2
Publication statusPublished - Sept 2004


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