Creating two-dimensional bright solitons in dipolar Bose-Einstein condensates

TL;DR

This paper proposes an experimental setup for creating stable, anisotropic two-dimensional bright solitons in dipolar Bose-Einstein condensates, using systematic simulations to demonstrate feasible creation methods under realistic conditions.

Contribution

It introduces a realistic experimental scheme for generating 2D dipolar BEC solitons, accounting for anisotropy, three-body losses, and noise, advancing the understanding of multidimensional matter-wave solitons.

Findings

Successful 3D simulation of soliton creation

Ramping scenario for scattering length and trap frequencies

Robust solitons withstand condensate excitations

Abstract

We propose a realistic experimental setup for creating quasi-two-dimensional (2D) bright solitons in dipolar Bose-Einstein condensates (BECs), the existence of which was proposed in Phys. Rev. Lett. 100, 090406 (2008). A challenging feature of the expected solitons is their strong inherent anisotropy, due to the necessary in-plane orientation of the local moments in the dipolar gas. This may be the first chance of making multidimensional matter-wave solitons, as well as solitons featuring the anistropy due to their intrinsic dynamics. Our analysis is based on the extended Gross-Pitaevskii equation, which includes three-body losses and noise in the scattering length, induced by fluctuations of currents inducing the necessary magnetic fields, which are factors crucial to the adequate description of experimental conditions. By means of systematic 3D simulations, we find a ramping scenario for the change of the scattering length and trap frequencies which results in the creation of robust solitons, that readily withstand the concomitant excitation of the condensate.