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Breakup of quantum liquid filaments into droplets

Francesco Ancilotto1,2, Manuel Barranco3,4, and Martí Pi3,4

  • 1Dipartimento di Fisica e Astronomia “Galileo Galilei” and CNISM, Università di Padova, Via Marzolo 8, 35122 Padova, Italy
  • 2CNR-IOM Democritos, Via Bonomea 265, 34136 Trieste, Italy
  • 3Departament FQA, Facultat de Física, Universitat de Barcelona, Diagonal 645, 08028 Barcelona, Spain
  • 4Institute of Nanoscience and Nanotechnology, Universitat de Barcelona, 08028 Barcelona, Spain

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Phys. Rev. A 107, 063312 – Published 21 June, 2023

DOI: https://doi.org/10.1103/PhysRevA.107.063312

Abstract

We investigate how the Rayleigh-Plateau instability of a filament made of a K41−Rb87 self-bound mixture may lead to an array of identical quantum droplets, with typical breaking times which are shorter than the lifetime of the mixture. If the filament is laterally confined, as it happens in a toroidal trap, and atoms of one species are in excess with respect to the optimal equilibrium ratio, the droplets are immersed into a superfluid background made by the excess species which provides global phase coherence to the system, suggesting that the droplet array in the unbalanced system may display supersolid character. This possibility is investigated by computing the nonclassical translational inertia coefficient. The filament may be a reasonable representation of a self-bound mixture subject to toroidal confinement when the bigger circle radius of the torus is much larger than the filament radius.

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Phys. Rev. A 107, 063312– Published 21 June, 2023
  • Received 21 April 2023
  • Accepted 8 June 2023
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