Dispersion and damping of two-dimensional dust acoustic waves: theory and simulation
نویسندگان
چکیده
A two-dimensional generalized hydrodynamics (GH) model is developed to study the full spectrum of both longitudinal and transverse dust acoustic waves (DAW) in strongly coupled complex (dusty) plasmas, with memory-function-formalism being implemented to enforce high-frequency sum rules. Results are compared with earlier theories (such as quasi-localized charge approximation and its extended version) and with a self-consistent Brownian dynamics simulation. It is found that the GH approach provides a good account, not only of dispersion relations, but also of damping rates of the DAW modes in a wide range of coupling strengths, an issue hitherto not fully addressed for dusty plasmas. 3 Author to whom any correspondence should be addressed. New Journal of Physics 12 (2010) 093034 1367-2630/10/093034+24$30.00 © IOP Publishing Ltd and Deutsche Physikalische Gesellschaft
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