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Origin and evolution of the multiply quantized vortex instability

Lookup NU author(s): Professor Carlo Barenghi

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This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).

Abstract

© 2022 authors. Published by the American Physical Society. Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.We show that the dynamical instability of quantum vortices with more than a single unit of circulation results from a superradiant bound state inside the vortex core. We then reveal a striking behavior of the system in the nonlinear regime. Counter to the expectation that the instability should produce well-separated vortices, the system evolves into a bound state of corotating singularities orbiting within a few healing lengths of each other, undergoing modulations in separation. During these modulations, kinetic energy is traded back and forth between sound waves and vortical degrees of freedom.

Publication metadata

Author(s): Patrick S, Geelmuyden A, Erne S, Barenghi CF, Weinfurtner S

Publication type: Article

Publication status: Published

Journal: Physical Review Research

Year: 2022

Volume: 4

Issue: 4

Online publication date: 14/11/2022

Acceptance date: 08/06/2022

Date deposited: 03/07/2023

ISSN (electronic): 2643-1564

Publisher: American Physical Society

URL: https://doi.org/10.1103/PhysRevResearch.4.043104

DOI: 10.1103/PhysRevResearch.4.043104

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