Quantized vortices in dipolar supersolid Bose-Einstein-condensed gases Article Swipe
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· 2020
· Open Access
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· DOI: https://doi.org/10.1103/physreva.102.023322
· OA: W3024131780
We investigate the properties of quantized vortices in a dipolar\nBose-Einstein condensed gas by means of a generalised Gross-Pitaevskii\nequation. The size of the vortex core hugely increases by increasing the weight\nof the dipolar interaction and approaching the transition to the supersolid\nphase. The critical angular velocity for the existence of an energetically\nstable vortex decreases in the supersolid, due to the reduced value of the\ndensity in the interdroplet region. The angular momentum per particle\nassociated with the vortex line is shown to be smaller than $\\hbar$, reflecting\nthe reduction of the global superfluidity. The real-time vortex nucleation in a\nrotating trap is shown to be triggered, as for a standard condensate, by the\nsoftening of the quadrupole mode. For large angular velocities, when the\ndistance between vortices becomes comparable to the interdroplet distance, the\nvortices are arranged into a honeycomb structure, which coexists with the\ntriangular geometry of the supersolid lattice and persists during the free\nexpansion of the atomic cloud.\n
