Transfer and scattering of wave packets by a nonlinear trap

TL;DR

This paper investigates how wave packets interact with a nonlinear trap in a one-dimensional model, exploring mode transfer, stability, and scattering, with implications for controlled wave manipulation.

Contribution

It introduces a method for dragging and transferring localized modes using nonlinear tweezers and analyzes their stability and scattering behavior.

Findings

Identified stability borders for dragged modes.

Quantified trapped, reflected, and transmitted wave shares.

Explored quasi-Airy modes with divergent norms.

Abstract

In the framework of a one-dimensional model with a tightly localized self-attractive nonlinearity, we study the formation and transfer (dragging) of a trapped mode by "nonlinear tweezers", as well as the scattering of coherent linear wave packets on the stationary localized nonlinearity. The use of the nonlinear trap for the dragging allows one to pick up and transfer the relevant structures without grabbing surrounding "garbage". A stability border for the dragged modes is identified by means of of analytical estimates and systematic simulations. In the framework of the scattering problem, the shares of trapped, reflected, and transmitted wave fields are found. Quasi-Airy stationary modes with a divergent norm, that may be dragged by the nonlinear trap moving at a constant acceleration, are briefly considered too.