Double-Quantum Spin Vortices in SU(3) Spin-Orbit Coupled Bose Gases

Abstract

We show that double-quantum spin vortices, which are characterized by doubly quantized circulating spin currents and unmagnetized filled cores, can exist in the ground states of SU(3) spin-orbit coupled Bose gases. It is found that the SU(3) spin-orbit coupling and spin-exchange interaction play important roles in determining the ground-state phase diagram. In the case of effective ferromagnetic spin interaction, the SU(3) spin-orbit coupling induces a three-fold degeneracy to the magnetized ground state, while in the antiferromagnetic spin interaction case, the SU(3) spin-orbit coupling breaks the ordinary phase rule of spinor Bose gases, and allows the spontaneous emergence of double-quantum spin vortices. This exotic topological defect is in stark contrast to the singly quantized spin vortices observed in existing experiments, and can be readily observed by the current magnetization-sensitive phase-contrast imaging technique.

References in corpus (18)

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• Spin-Injection Spectroscopy of a Spin-Orbit Coupled Fermi Gas
• Degenerate Quantum Gases with Spin-Orbit Coupling
• Spin-Orbit Coupled Spinor Bose-Einstein Condensates
• Spin-orbit coupled Bose-Einstein condensates
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• Unconventional Bose-Einstein Condensations Beyond the "No-node" Theorem
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• Symmetry classification of spin-orbit coupled spinor Bose-Einstein condensates
• Interacting spin-orbit-coupled spin-1 Bose-Einstein condensates
• SU(3) Spin-Orbit Coupling in Systems of Ultracold Atoms
• Angular spin-orbit coupling in cold atoms
• Energetically stable singular vortex cores in an atomic spin-1 Bose-Einstein condensate
• Pairing Superfluidity in Spin-Orbit Coupled Ultracold Fermi Gases
• Spiral spin textures of bosonic Mott insulator with SU(3) spin-orbit coupling

Cited by in corpus (7)

• Vortex pairs in a spin-orbit coupled Bose-Einstein condensate
• Chiral waveguide optomechanics: first order quantum phase transitions with ${\mathbb{Z}}_3$ symmetry breaking/
• Flipping-shuttle oscillations of bright one- and two-dimensional solitons in spin-orbit-coupled Bose-Einstein condensates with Rabi mixing
• Gauge-potential-induced rotation of spin-orbit-coupled Bose-Einstein condensates
• Supersolid-like solitons in spin-orbit coupled spin-2 condensate
• $SU(3)$ Topological Insulators in the Honeycomb Lattice
• Dragging spin-orbit-coupled solitons by a moving optical lattice