Dispersion and damping of two-dimensional dust acoustic waves: Theory and Simulation
arXiv:1006.1799 · doi:10.1088/1367-2630/12/9/093034
Abstract
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 good account, not only for dispersion relations, but also for damping rates of the DAW modes in a wide range of coupling strengths, an issue hitherto not fully addressed for dusty plasmas.
28 pages, 13 figures
References in corpus (7)
- Dynamical correlations and collective excitations of Yukawa liquids
- Time correlation functions and transport coefficients of two-dimensional Yukawa liquids
- Experimental observation of strong coupling effects on the dispersion of dust acoustic waves in a plasma
- Brownian Dynamics of charged particles in a constant magnetic field
- Wave spectra of 2D Yukawa solids and liquids in the presence of a magnetic field
- Driven transverse shear waves in a strongly coupled dusty plasma
- A Gear-like Predictor-Corrector method for Brownian Dynamics Simulation