Energetically stable singular vortex cores in an atomic spin-1 Bose-Einstein condensate

Abstract

We analyze the structure and stability of singular singly quantized vortices in a rotating spin-1 Bose-Einstein condensate. We show that the singular vortex can be energetically stable in both the ferromagnetic and polar phases despite the existence of a lower-energy nonsingular coreless vortex in the ferromagnetic phase. The spin-1 system exhibits an energetic hierarchy of length scales resulting from different interaction strengths and we find that the vortex cores deform to a larger size determined by the characteristic length scale of the spin-dependent interaction. We show that in the ferromagnetic phase the resulting stable core structure, despite apparent complexity, can be identified as a single polar core with axially symmetric density profile which is nonvanishing everywhere. In the polar phase, the energetically favored core deformation leads to a splitting of a singly quantized vortex into a pair of half-quantum vortices that preserves the topology of the vortex outside the extended core region, but breaks the axial symmetry of the core. The resulting half-quantum vortices exhibit nonvanishing ferromagnetic cores.

14 pages, 15 figures

References in corpus (10)

• Spontaneous symmetry breaking in a quenched ferromagnetic spinor Bose condensate
• Quantized Rotation of Atoms From Photons with Orbital Angular Momentum
• Spontaneously modulated spin textures in a dipolar spinor Bose-Einstein condensate
• Discrete symmetries and 1/3-quantum vortices in condensates of F=2 cold atoms
• Non-Abelian magnetic monopole in a Bose-Einstein condensate
• Creating vortons and three-dimensional skyrmions from domain wall annihilation with stretched vortices in Bose-Einstein condensates
• Classifying Vortices in S=3 Bose-Einstein Condensates
• Coherent atomic soliton molecules for matter-wave switching
• Vortex splitting and phase separating instabilities of coreless vortices in F=1 spinor Bose-Einstein condensates
• Pulsating and persistent vector solitons in a Bose-Einstein condensate in a lattice upon phase separation instability

Cited by in corpus (3)

• Observable Vortex Properties in Finite Temperature Bose Gases
• Topological interface physics of defects and textures in spinor Bose-Einstein condensates
• Skyrmion dynamics and disintegration in a spin-1 Bose-Einstein condensate