Nonlinear modulated dust lattice wave packets in two-dimensional hexagonal dust crystals
- Department of Physics, Arak-University, Arak, 38156-879 (Iran, Islamic Republic of)
The amplitude modulation of dust lattice waves (DLWs) propagating in a two-dimensional hexagonal dust crystal is investigated in a continuum approximation, accounting for the effect of dust charge polarization (dressed interactions). A dusty plasma crystalline configuration with constant dust grain charge and mass is considered. The dispersion relation and the group velocity for DLWs are determined for wave propagation in both longitudinal and transverse directions. The reductive perturbation method is used to derive a (2+1)-dimensional nonlinear Schroedinger equation (NLSE). New expressions for the coefficients of the NLSE are derived and compared, for a Yukawa-type potential energy and for a 'dressed' potential energy, taking into account interaction and geometric nonlinearities.
- OSTI ID:
- 20860428
- Journal Information:
- Physics of Plasmas, Vol. 13, Issue 12; Other Information: DOI: 10.1063/1.2400594; (c) 2006 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 1070-664X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
AMPLITUDES
APPROXIMATIONS
CRYSTALS
DISPERSION RELATIONS
DUSTS
MODULATION
NONLINEAR PROBLEMS
ONE-DIMENSIONAL CALCULATIONS
PERTURBATION THEORY
PLASMA
PLASMA WAVES
POLARIZATION
POTENTIAL ENERGY
SCHROEDINGER EQUATION
TWO-DIMENSIONAL CALCULATIONS
WAVE PACKETS
WAVE PROPAGATION
YUKAWA POTENTIAL