Dynamics of polar-core spin vortices in a ferromagnetic spin-1 Bose-Einstein condensate

Abstract

A ferromagnetic spin-1 condensate supports polar-core spin vortices (PCVs) in the easy-plane phase. We derive a model for the dynamics of these PCVs using a variational Lagrangian approach. The PCVs behave as massive charged particles interacting under the two dimensional Coulomb interaction, with the mass arising from interaction effects within the vortex core. We compare this model to numerical simulations of the spin-1 Gross-Pitaevskii equations and find semi-quantitative agreement. In addition, the numerical results suggest that the PCV core couples to spin waves, and this affects the PCV dynamics even far from the core. We identify areas of further research that could extend the model of PCV dynamics presented here.

10 pages, 6 figures

References in corpus (11)

• Spontaneous symmetry breaking in a quenched ferromagnetic spinor Bose condensate
• Critical Dynamics of Spontaneous Symmetry Breaking in a Homogeneous Bose gas
• Emergence of coherence in a uniform quasi-two-dimensional Bose gas
• Quantum quenches in a spinor condensate
• Energy spectra of vortex distributions in two-dimensional quantum turbulence
• Kibble-Zurek mechanism in a quenched ferromagnetic Bose-Einstein condensate
• Dynamics of a quantum phase transition in a ferromagnetic Bose-Einstein condensate
• Vortex quantum creation and winding number scaling in a quenched spinor Bose gas
• Interaction of half-quantized vortices in two-component Bose-Einstein condensates
• Topological defect formation in quenched ferromagnetic Bose-Einstein condensates
• Sound-induced vortex interactions in a zero-temperature two-dimensional superfluid

Cited by in corpus (7)

• Mass-driven vortex collisions in flat superfluids
• Properties of a nematic spin vortex in an antiferromagnetic spin-1 Bose-Einstein condensate
• Dynamics of a Nonequilibrium Discontinuous Quantum Phase Transition in a Spinor Bose-Einstein Condensate
• Berezinskii-Kosterlitz-Thouless transitions in an easy-plane ferromagnetic superfluid
• Core structure of static ferrodark solitons in a spin-1 Bose-Einstein condensate
• Dynamics of Polar-Core Spin Vortices in Inhomogeneous Spin-1 Bose-Einstein Condensates
• Optical-plug-assisted spin vortex in a ${}^{87}$Rb dipolar spinor Bose-Einstein condensate