Suppression of capillary instability in a confined quantum liquid filament
Year: 2025
Authors: Ancilotto F., Modugno M., Fort C.
Autors Affiliation: Univ Padua, Dipartimento Fis & Astron Galileo Galilei, I-35131 Padua, Italy; Univ Padua, CNISM, I-35131 Padua, Italy; CNR Officina Materiali IOM, Via Bonomea 265, I-34136 Trieste, Italy; Univ Basque Country UPV EHU, Dept Phys, Bilbao 48080, Spain; Basque Fdn Sci, IKERBASQUE, Bilbao 48013, Spain; Univ Basque Country, EHU Quantum Ctr, UPV EHU, Leioa, Biscay, Spain; Univ Firenze, Dipartimento Fis & Astron, I-50019 Sesto Fiorentino, Italy; Univ Firenze, European Lab Nonlinear Spect, I-50019 Sesto Fiorentino, Italy; Ist Nazl Ottica, CNR INO, I-50019 Sesto Fiorentino, Italy.
Abstract: Quantum Bose-Bose mixtures with large interspecies attraction can form self-bound, liquid-like droplets stabilized by quantum fluctuations. Despite equilibrium densities much lower than those of classical liquids, these droplets exhibit finite surface tension and liquid-like behaviors. Recent experiments have demonstrated Rayleigh-Plateau instability (a paradigmatic example of capillary instability) in elongated droplets confined in an optical waveguide. Here, we consider the case of an infinite filament and extend the theoretical description to include transverse harmonic confinement. By solving the Bogoliubov-de Gennes equations within a single-component framework, benchmarked against full Gross-Pitaevskii simulations, we show that increasing confinement progressively suppresses the instability, leading to complete stabilization beyond a critical trap frequency.
Journal/Review: PHYSICAL REVIEW A
Volume: 112 (4) Pages from: 43316-1 to: 43316-10
More Information: We thank A. Burchianti and L. Cavicchioli, for valuable discussion and for their critical reading of the manuscript. This work was supported by the European Union-NextGeneration EU, within PRIN 2022, PNRR M4C2, Project QUANTAMI 20227JNCWW (CUP B53D23005010006), PNRR MUR Project No. PE0000023-NQSTI and the Integrated infrastructure initiative in Photonic and Quantum Sciences I-PHOQS (IR0000016, ID D2B8D520, CUP B53C22001750006). M.M. acknowledges support from Grant No. PID2021-126273NB-I00 funded by MCIN/AEI/10.13039/501100011033 and by ERDF A way of making Europe, as well as from the Basque Government through Grant No. IT1470-22.KeyWords: Einstein; Droplets; ThreadDOI: 10.1103/f1j6-st85
