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Crossover from interaction to driven regimes in quantum vortex reconnections

Lookup NU author(s): Dr Luca Galantucci, Dr Andrew Baggaley, Dr Nicholas Parker, Professor Carlo Barenghi

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This is the authors' accepted manuscript of an article that has been published in its final definitive form by National Academy of Sciences, 2019.

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Abstract

Vortex reconnections are fundamental events in fluid motion, randomizing the velocity field, changing the topology, and redistributing energy across length scales. In superfluid helium and atomic Bose–Einstein condensates, vortices are effectively one-dimensional lines called quantum vortices (akin to minitornadoes of a fixed strength). Individual reconnections happen when two vortices collide and subsequently recoil, exchanging heads and tails. Recent experimental progress opens the possibility of answering the important question as to whether reconnections obey a universal behavior. Here we show that the intervortex distance between reconnecting vortices obeys two fundamental scaling laws, which we identify in experimental data and numerical simulations, across homogeneous superfluids and trapped condensates.


Publication metadata

Author(s): Galantucci L, Baggaley AW, Parker NG, Barenghi CF

Publication type: Article

Publication status: Published

Journal: Proceedings of the National Academy of Sciences of the United States of America

Year: 2019

Volume: 116

Issue: 25

Pages: 12204-12211

Print publication date: 18/06/2019

Online publication date: 06/06/2019

Acceptance date: 06/05/2019

Date deposited: 07/06/2019

ISSN (print): 0027-8424

ISSN (electronic): 1091-6490

Publisher: National Academy of Sciences

URL: https://doi.org/10.1073/pnas.1818668116

DOI: 10.1073/pnas.1818668116


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