14 citations
5 papers
Existence of multi-site intrinsic localized modes in one-dimensional Debye crystals
V. Koukouloyannis, I. Kourakis
The existence of highly localized multi-site oscillatory structures (discrete multibreathers) in a nonlinear Klein-Gordon chain which is characterized by an inverse dispersion law…
Modulated envelope localized wavepackets associated with electrostatic plasma waves
Ioannis Kourakis, Padma Kant Shukla
The nonlinear amplitude modulation of known electrostatic plasma modes is examined in a generic manner, by applying a collisionless fluid model. Both cold (zero-temperature) and wa…
Lagrangean formulation of ion- and dust-ion-acoustic waves
Ioannis Kourakis, Padma Kant Shukla
Ion-acoustic modes propagating in unmagnetized dusty plasmas are studied by applying a generic collisionless fluid model. An Eulerian-to-Lagrangean variable transformation leads to…
Theory of solitary waves in complex plasma lattices
Ioannis Kourakis, Padma Kant Shukla, Bengt Eliasson
A comprehensive analytical theory for nonlinear excitations related to horizontal (longitudinal, acoustic mode) as well as vertical (transverse, optical mode) motion of charged dus…
Nonlinear cyclotron-resonance accelerations by a generalized EM wave
Kazuhiro Akimoto, Hitoshi Hojo
Particle accelerations by a 1D, EM, dispersive pulse in an external magnetic field are investigated. It is found that the well-known cyclotron resonance may be classified into thre…