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Molecular dynamics investigation of soliton propagation in a two‐dimensional Yukawa liquid
Author(s) -
Donkó Zoltán,
Hartmann Peter,
Masheyeva Ranna U.,
Dzhumagulova Karlygash N.
Publication year - 2020
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.201900197
Subject(s) - yukawa potential , physics , soliton , magnetic field , perturbation (astronomy) , electric field , field (mathematics) , perturbation theory (quantum mechanics) , dynamics (music) , quantum electrodynamics , condensed matter physics , classical mechanics , quantum mechanics , nonlinear system , mathematics , pure mathematics , acoustics
We investigate via molecular dynamics simulations the propagation of solitons in a two‐dimensional many‐body system characterized by Yukawa interaction potential. The solitons are created in an equilibrated system by the application of electric field pulses. Such pulses generate pairs of solitons, which are characterized by a positive and negative density peak, respectively, and which propagate into opposite directions. At small perturbation, the features propagate with the longitudinal sound speed, from which an increasing deviation is found at higher density perturbations. An external magnetic field is found to block the propagation of the solitons, which can, however, be released upon the termination of the magnetic field and can propagate further into directions that depend on the time of trapping and the magnetic field strength.