Vorticity Induced by Non-frontal Collisions of Quantum Droplets

Abstract:The rotational dynamics induced by the non-frontal binary collisions of quantum droplets composed of ultracold alkali atoms are analyzed. A theoretical study is presented within the extended Gross-Pitaevskii equation framework, using experimentally feasible conditions. Numerical experiments elucidate a rich landscape of possible topological excitations in the system that are robust towards measurements. The collision of heteronuclear quantum droplets composed of $^{41}$K and $^{87}$Rb atoms in the incompressible regime gives rise to dynamical instabilities that spontaneously generate topological defects: vortex rings, dislocation lines, and vortices in one species. Their presence depends on the Weber number and the impact parameter. An experimental proposal for vortex detection in both real and Fourier space using interaction ramps is described.

6 pages, 4 figures and 3 pages of Supplemental Material. Accepted as Letter in Physical Review Research

Quantum Gases (cond-mat.quant-gas); Atomic Physics (physics.atom-ph); Quantum Physics (quant-ph)

arXiv:2606.17498 [cond-mat.quant-gas]

(or arXiv:2606.17498v3 [cond-mat.quant-gas] for this version)

https://doi.org/10.48550/arXiv.2606.17498 Focus to learn more arXiv-issued DOI via DataCite

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