Evolution and decay of an Alice ring in a spinor Bose-Einstein condensate
Loading...
Access rights
openAccess
URL
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
This publication is imported from Aalto University research portal.
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
View publication in the Research portal (opens in new window)
View/Open full text file from the Research portal (opens in new window)
Other link related to publication (opens in new window)
Date
2023-04
Department
Major/Subject
Mcode
Degree programme
Language
en
Pages
10
1-10
1-10
Series
PHYSICAL REVIEW RESEARCH, Volume 5, issue 2
Abstract
We use first-principles-derived numerical simulations to investigate the long-time evolution of a half-quantum vortex ring, an Alice ring, arising from the decay dynamics of an isolated monopole in the polar phase of a dilute spin-1 Bose-Einstein condensate. In particular, we study the lifetime and decay characteristics of the Alice ring under different experimentally relevant conditions. We observe that, in a Rb87 condensate with a homogeneous external magnetic field, a well-centered Alice ring may survive for over 160 ms, and that during its lifetime it can contract back into a monopole, which again converts into an Alice ring. Interestingly, we notice an additional Alice ring, with an opposite topological charge, to emerge during the decay dynamics within the condensate, leading to the coexistence of two Alice rings in the same cloud. Shortly after this coexistence, the original Alice ring breaks into a line-like defect referred to as an Alice string. We find that the location of the initial isolated monopole correlates with the winding direction of the scalar phase in the produced vortex ring, a phenomenon which we utilize to create two Alice rings with opposite charges and opposite winding directions. Such created Alice ring and anti-Alice ring naturally annihilate each other in the subsequent evolution.Description
Funding Information: We acknowledge financial support from the Academy of Finland through its Centre of Excellence in Quantum Technology (Grant No. 336810) and computational resources from CSC - IT Center for Science, Finland. We thank David Hall, Tuomas Ollikainen, and Toni Annala for useful discussions. Publisher Copyright: © 2023 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.
Keywords
Other note
Citation
Kivioja, M, Zamora-Zamora, R, Blinova, A, Mönkölä, S, Rossi, T & Möttönen, M 2023, ' Evolution and decay of an Alice ring in a spinor Bose-Einstein condensate ', PHYSICAL REVIEW RESEARCH, vol. 5, no. 2, 023104, pp. 1-10 . https://doi.org/10.1103/PhysRevResearch.5.023104