Trapping and transmission of matter-wave solitons in a collisionally inhomogeneous environment

TL;DR

This paper explores how spatially varying interactions can trap and control matter-wave solitons, enabling confinement and enhanced transmission without external traps, thus offering new methods to manipulate atomic wave dynamics.

Contribution

It demonstrates that inhomogeneous collisional interactions can confine and transmit matter-wave solitons, providing a novel approach to control their behavior without external potentials.

Findings

Solitons can be confined solely by inhomogeneous interactions.

Enhanced transmission of solitons through barriers is achievable.

Manipulating atomic interactions offers versatile control of matter waves.

Abstract

We investigate bright matter-wave solitons in the presence of a spatially varying scattering length. It is demonstrated that, even in the absence of any external trapping potential, a soliton can be confined due to the inhomogeneous collisional interactions. Moreover we observe the enhanced transmission of matter-wave solitons through potential barriers for suitably chosen spatial variations of the scattering length. The results indicate that the manipulation of atomic interactions can become a versatile tool to control the dynamics of matter waves.