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Mass-driven vortex collisions in flat superfluids

Andrea Richaud1,2,*, Giacomo Lamporesi3, Massimo Capone1,4, and Alessio Recati3

  • 1Scuola Internazionale Superiore di Studi Avanzati (SISSA), Via Bonomea 265, I-34136 Trieste, Italy
  • 2Departament de Física, Universitat Politècnica de Catalunya, Campus Nord B4-B5, E-08034 Barcelona, Spain
  • 3Pitaevskii BEC Center, CNR-INO and Dipartimento di Fisica, Università di Trento, I-38123 Trento, Italy
  • 4CNR-IOM Democritos, Via Bonomea 265, I-34136 Trieste, Italy

  • *Corresponding author: andrea.richaud@upc.edu
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Phys. Rev. A 107, 053317 – Published 26 May, 2023

DOI: https://doi.org/10.1103/PhysRevA.107.053317

Abstract

Quantum vortices are often endowed with an effective inertial mass, due, for example, to massive particles in their cores. Such “massive vortices” display new phenomena beyond the standard picture of superfluid vortex dynamics, where mass is neglected. In this work, we demonstrate that massive vortices are allowed to collide, as opposed to their massless counterparts. We propose a scheme to generate controllable, repeatable, deterministic collisional events in pairs of quantum vortices. We demonstrate two mass-driven fundamental processes: (i) the annihilation of two counter-rotating vortices and (ii) the merging of two corotating vortices, thus pointing out new mechanisms supporting incompressible-to-compressible kinetic-energy conversion, as well as doubly quantized vortex stabilization in flat superfluids.

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Outline

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Phys. Rev. A 107, 053317– Published 26 May, 2023
  • Received 1 September 2022
  • Revised 9 March 2023
  • Accepted 11 May 2023
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