Crystallized half-skyrmions and inverted half-skyrmions in the condensation of spin-1 Bose gases with spin-orbit coupling

Su, Shih-Wei; Liu, I-Kang; Tsai, Yi-Cheng; Liu, W. M.; Gou, Shih-Chuan

doi:10.1103/physreva.86.023601

Cited by 66 publications

(25 citation statements)

References 47 publications

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“…The explicit formalism of the SPGPE has been presented in Refs. [29][30][31][32], and here we merely outline the particular method we use in this work. Generally, the SPGPE method divides the system into the coherent region and the incoherent region.…”

Section: Stochastic Projected Gross-pitaevskii Equations For Psementioning

confidence: 99%

Circular-hyperbolic skyrmion in rotating pseudo-spin-1/2 Bose-Einstein condensates with spin-orbit coupling

et al. 2012

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By exploring the spin-orbit-coupled rotating pseudo-spin-1/2 Bose-Einstein condensates with the stochastic projected Gross-Pitaevskii equations, we prove the existence of the circular-hyperbolic skyrmion, which possesses two extreme values of S z . The nonequal intraspecies interactions and interspecies interactions cause the two components to be wholly disproportionate when the system reaches the equilibrium state. The circular-hyperbolic skyrmion results from the vortex-dipole structure. For the miscible condensates, the increase of spin-orbit coupling enhances the creation of the circular-hyperbolic skyrmion, and makes them link one after another locally. In particular, the circular-hyperbolic skyrmion even can form a chain when the spin-orbit coupling is only in one direction. For the immiscible condensates, the hyperbolic skyrmion occurs at the center, while the circular-hyperbolic skyrmion occurs at the outskirts of the condensates. The increase of the spin-orbit coupling restricts the creation of the hyperbolic skyrmion and enhances the creation of the circular-hyperbolic skyrmion.

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Section: Stochastic Projected Gross-pitaevskii Equations For Psementioning

confidence: 99%

Circular-hyperbolic skyrmion in rotating pseudo-spin-1/2 Bose-Einstein condensates with spin-orbit coupling

et al. 2012

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“…This is not only different from the Abrikosov triangular lattice of superconductors [42], but also from the square or hexagonal lattice discovered in traditional multi-component superfluids [7,[61][62][63][64]. It should also be emphasized that in the coaxially annular arrays all the vortices take the same direction of circulation which different from those spontaneous vortex lattices in a irrotational SO-coupled system, where vortices and antivortices emerge in pairs [65][66][67][68][69][70].…”

Section: Many-body Ground Statesmentioning

confidence: 71%

Gauge-potential-induced rotation of spin-orbit-coupled Bose-Einstein condensates

2018

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We demonstrate that a spin-orbit-coupled Bose-Einstein condensate can be effectively rotated by adding a real magnetic field to inputting gauge angular momentum, which is distinctly different from the traditional ways of rotation by stirring or Raman laser dressing to inputting canonical angular momentum. The gauge angular momentum is accompanied by the spontaneous generation of equal and opposite canonical angular momentum in the ground states, and it leads to the nucleation of quantized vortices. We explain this by indicating that the effective rotation with the vortex nucleation results from the effective magnetic flux induced by the gauge potential, which is essentially different from the previous scheme of creating vortices by synthetic magnetic fields. In the weakly interacting regime, symmetrically placed domains separated by vortex lines as well as half-integer giant vortices are discovered. With relatively strong interatomic interaction, we predict a structure of coaxially arranged annular vortex arrays, which is in stark contrast to the familiar Abrikosov vortex lattice. The developed way of rotation may be extended to a more general gauge system.

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“…surprising observation is that all the vortices choose the same direction of circulation, which is distinct from those observed in an SO-coupled hard-core system, where vortices and antivortices emerge in pairs [58][59][60][61][62][63][64][65].…”

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confidence: 65%

Chiral Supersolid in Spin-Orbit-Coupled Bose Gases with Soft-Core Long-Range Interactions

et al. 2018

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Chirality represents a kind of symmetry breaking characterized by the noncoincidence of an object with its mirror image and has been attracting intense attention in a broad range of scientific areas. The recent realization of spin-orbit coupling in ultracold atomic gases provides a new perspective to study quantum states with chirality. In this Letter, we demonstrate that the combined effects of spin-orbit coupling and interatomic soft-core long-range interaction can induce an exotic supersolid phase in which the chiral symmetry is broken with spontaneous emergence of circulating particle current. This implies that a finite angular momentum can be generated with neither rotation nor effective magnetic field. The direction of the angular momentum can be altered by adjusting the strength of spin-orbit coupling or interatomic interaction. The predicted chiral supersolid phase can be experimentally observed in Rydberg-dressed Bose-Einstein condensates with spin-orbit coupling.

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Crystallized half-skyrmions and inverted half-skyrmions in the condensation of spin-1 Bose gases with spin-orbit coupling

Cited by 66 publications

References 47 publications

Circular-hyperbolic skyrmion in rotating pseudo-spin-1/2 Bose-Einstein condensates with spin-orbit coupling

Circular-hyperbolic skyrmion in rotating pseudo-spin-1/2 Bose-Einstein condensates with spin-orbit coupling

Gauge-potential-induced rotation of spin-orbit-coupled Bose-Einstein condensates

Chiral Supersolid in Spin-Orbit-Coupled Bose Gases with Soft-Core Long-Range Interactions

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