Dark solitons under higher order dispersion

TL;DR

This paper theoretically demonstrates the existence and diverse dynamics of dark solitons in systems with higher order dispersion, including quartic effects, revealing new stable states and potential for multi-soliton configurations.

Contribution

It introduces the existence of dark solitons under pure and combined quadratic and quartic dispersion, expanding understanding of soliton behavior in complex dispersive environments.

Findings

Dark solitons can exist with pure quartic dispersion.

Interplay of quadratic and quartic dispersion leads to oscillatory tails.

Potential for stable multi-soliton states and new generation methods.

Abstract

We show theoretically that dark solitons can exist in the presence of pure quartic dispersion, and also in the presence of both quadratic and quartic dispersive effects, displaying a much greater variety of possible solutions and dynamics than for pure quadratic dispersion. The interplay of the two dispersion orders may lead to oscillatory non-vanishing tails, which enables the possibility of bound, potentially stable, multi-soliton states. Dark soliton-like states which connect to low amplitude oscillations are also shown to be possible. Dynamical evolution results corroborate the stability picture obtained, and possible avenues for dark soliton generation are explored.