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Quantum Elliptic Vortex in a Nematic-Spin Bose-Einstein Condensate

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arxiv 2009.03556 v4 pith:BTB5SWOY submitted 2020-09-08 cond-mat.quant-gas cond-mat.other

Hiromitsu Takeuchi This is my paper · ORCID
classification cond-mat.quant-gascond-mat.other
keywords vortexbose-einsteincondensatesellipticlengthnematic-spinquantumspin
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We find a novel topological defect in a spin-nematic superfluid theoretically. A quantized vortex spontaneously breaks its axisymmetry, leading to an elliptic vortex in nematic-spin Bose-Einstein condensates with small positive quadratic Zeeman effect. The new vortex is considered the Joukowski transform of a conventional vortex. Its oblateness grows when the Zeeman length exceeds the spin healing length. This structure is sustained by balancing the hydrodynamic potential and the elasticity of a soliton connecting two spin spots, which are observable by in situ magnetization imaging. The theoretical analysis clearly defines the difference between half quantum vortices of the polar and antiferromagnetic phases in spin-1 condensates.

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    hep-ph 2025-02 conditional novelty 4.0 of 10

    The C-string-wall network from SO(10) breaking with unbroken C-parity produces a gravitational wave background peaking between 100 Hz and 100 kHz for intermediate breaking scales around 10^10 to 10^12 GeV.

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