# Spinor dipolar Bose-Einstein condensates; Classical spin approach

## TL;DR

This paper models magnetic dipole-dipole interaction dominated Bose-Einstein condensates using a classical spin vector approach, revealing novel spin textures influenced by trap geometry and long-range interactions.

## Contribution

It introduces a classical spin vector framework derived from a large spin limit to analyze dipolar Bose-Einstein condensates, extending the non-linear sigma model.

## Key findings

- Discovery of novel spin textures with coupled mass and spin densities
- Dependence of spin textures on trap geometries
- Insights into the effects of long-range dipole-dipole interactions

## Abstract

Magnetic dipole-dipole interaction dominated Bose-Einstein condensates are discussed under spinful situations. We treat the spin degrees of freedom as a classical spin vector, approaching from large spin limit to obtain an effective minimal Hamiltonian; a version extended from a non-linear sigma model. By solving the Gross-Pitaevskii equation we find several novel spin textures where the mass density and spin density are strongly coupled, depending upon trap geometries due to the long-range and anisotropic natures of the dipole-dipole interaction.