Supersolitons: Solitonic excitations in atomic soliton chains

TL;DR

This paper demonstrates how tuning interactions in two-component nonlinear Schrödinger equations can produce supersolitons—solitonic excitations with particle-like collisions—enabling the creation of Newton's cradle analogues and localized excitations in soliton chains.

Contribution

It introduces the concept of supersolitons in two-component nonlinear Schrödinger systems and provides a physical explanation, analysis, and simulations supporting their existence.

Findings

Achieved particle-like solitonic collisions through interaction tuning.

Constructed an analogue of Newton's cradle with supersolitons.

Confirmed supersoliton behavior with direct numerical simulations.

Abstract

We show that, by appropriately tuning physically relevant interactions in two-component nonlinear Schrodinger equations, it is possible to achieve a regime with particle-like solitonic collisions. This allows us to construct an analogue of the Newton's cradle and also to create localized collective excitations in solitary-wave chains which are quasi-integrable solitons, i.e. supersolitons. We give a physical explanation of the phenomenon, support it with a perturbative analysis, and confirm our predictions by direct simulations.