TY  - JOUR
PB  - SciPost Foundation
DO  - 10.21468/SciPostPhys.18.4.134
TI  - Dynamics of polar-core spin vortices in inhomogeneous spin-1 Bose-Einstein condensates
PY  - 2025/04/23
UR  - https://scipost.org/SciPostPhys.18.4.134
JF  - SciPost Physics
JA  - SciPost Phys.
VL  - 18
IS  - 4
SP  - 134
A1  - Stevens-Hough, Zachary L.
AU  - Davis, Matthew J.
AU  - Williamson, Lewis
AB  - In the easy-plane phase, a ferromagnetic spin-1 Bose-Einstein condensate is magnetized in a plane transverse to the applied Zeeman field. This phase supports polar-core spin vortices (PCVs), which consist of phase windings of transverse magnetization. Here we show that spin-changing collisions cause a PCV to accelerate down density gradients in an inhomogeneous condensate. The dynamics is well-described by a simplified model adapted from scalar systems, which predicts the dependence of the dynamics on trap tightness and quadratic Zeeman energy. In a harmonic trap, a PCV accelerates radially to the condensate boundary, in stark contrast to the azimuthal motion of vortices in a scalar condensate. In a trap that has a local potential maximum at the centre, the PCV exhibits oscillations around the trap centre, which persist for a remarkably long time. The oscillations coincide with the emission and reabsorption of axial spin waves, which reflect off the condensate boundary.
ER  -

@Article{10.21468/SciPostPhys.18.4.134,
	title={{Dynamics of polar-core spin vortices in inhomogeneous spin-1 Bose-Einstein condensates}},
	author={Zachary L. Stevens-Hough and Matthew J. Davis and Lewis A. Williamson},
	journal={SciPost Phys.},
	volume={18},
	pages={134},
	year={2025},
	publisher={SciPost},
	doi={10.21468/SciPostPhys.18.4.134},
	url={https://scipost.org/10.21468/SciPostPhys.18.4.134},
}