Stable multipeak vector solitons in spinorbit coupled spin1 polar condensates
Abstract
We demonstrate the formation of multipeak threecomponent stationary stripe vector solitons in a quasionedimensional spinorbitcoupled hyperfine spin F = 1 polar BoseEinstein condensate. The present investigation is carried out through a numerical solution by imaginarytime propagation and an analytic variational approximation of the underlying meanfield GrossPitaevskii equation. Simple analytic results for energy and component densities were found to be in excellent agreement with the numerical results for solitons with more than 100 pronounced maxima and minima. The vector solitons are one of the two types: darkbrightdark or brightdarkbright. In the former a maximum density in component F_{z} = 0 at the center is accompanied by a zero in components F_{z} = ± 1 . The opposite happens in the latter case. The vector solitons are demonstrated to be mobile and dynamically stable. The collision between two such vector solitons is found to be quasi elastic at large velocities with the conservation of total density of each vector soliton. However, at very small velocity, the collision is inelastic with a destruction of the initial vector solitons. It is possible to observe and study the predicted SOcoupled vector solitons in a laboratory.
 Publication:

Physica E LowDimensional Systems and Nanostructures
 Pub Date:
 April 2020
 DOI:
 10.1016/j.physe.2019.113892
 arXiv:
 arXiv:1912.07675
 Bibcode:
 2020PhyE..11813892A
 Keywords:

 Spinor BoseEinstein condensate;
 Soliton formation;
 GrossPitaevskii equation;
 Variational approximation;
 Antiferromagnetic condensate;
 Condensed Matter  Quantum Gases;
 Nonlinear Sciences  Pattern Formation and Solitons
 EPrint:
 arXiv admin note: text overlap with arXiv:1911.03498