Molecular dynamics investigation of soliton propagation in a two-dimensional Yukawa liquid

TL;DR

This study uses Molecular Dynamics simulations to explore how solitons propagate in a two-dimensional Yukawa liquid, revealing effects of perturbation strength and magnetic fields on soliton behavior.

Contribution

It demonstrates the creation and control of solitons in a 2D Yukawa system, including magnetic field effects on their propagation and trapping.

Findings

Solitons propagate at the longitudinal sound speed at small perturbations.

Magnetic fields can block and trap solitons, which can be released after field removal.

Propagation direction depends on trapping duration and magnetic field strength.

Abstract

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, form 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.