Decay of a Quantum Knot

T. Ollikainen (Corresponding Author), A. Blinova, M. Möttönen, D. S. Hall

Research output: Contribution to journalArticleScientificpeer-review

Abstract

We experimentally study the dynamics of quantum knots in a uniform magnetic field in spin-1 Bose-Einstein condensates. The knot is created in the polar magnetic phase, which rapidly undergoes a transition toward the ferromagnetic phase in the presence of the knot. The magnetic order becomes scrambled as the system evolves, and the knot disappears. Strikingly, over long evolution times, the knot decays into a polar-core spin vortex, which is a member of a class of singular SO(3) vortices. The polar-core spin vortex is stable with an observed lifetime comparable to that of the condensate itself. The structure is similar to that predicted to appear in the evolution of an isolated monopole defect, suggesting a possible universality in the observed topological transition.

Original languageEnglish
Article number163003
JournalPhysical Review Letters
Volume123
Issue number16
DOIs
Publication statusPublished - 16 Oct 2019
MoE publication typeA1 Journal article-refereed

Fingerprint

vortices
decay
Bose-Einstein condensates
monopoles
condensates
life (durability)
defects
magnetic fields

Cite this

Ollikainen, T., Blinova, A., Möttönen, M., & Hall, D. S. (2019). Decay of a Quantum Knot. Physical Review Letters, 123(16), [163003]. https://doi.org/10.1103/PhysRevLett.123.163003
Ollikainen, T. ; Blinova, A. ; Möttönen, M. ; Hall, D. S. / Decay of a Quantum Knot. In: Physical Review Letters. 2019 ; Vol. 123, No. 16.
@article{45eb3e7142c1432b8ab4a53fa5af8891,
title = "Decay of a Quantum Knot",
abstract = "We experimentally study the dynamics of quantum knots in a uniform magnetic field in spin-1 Bose-Einstein condensates. The knot is created in the polar magnetic phase, which rapidly undergoes a transition toward the ferromagnetic phase in the presence of the knot. The magnetic order becomes scrambled as the system evolves, and the knot disappears. Strikingly, over long evolution times, the knot decays into a polar-core spin vortex, which is a member of a class of singular SO(3) vortices. The polar-core spin vortex is stable with an observed lifetime comparable to that of the condensate itself. The structure is similar to that predicted to appear in the evolution of an isolated monopole defect, suggesting a possible universality in the observed topological transition.",
author = "T. Ollikainen and A. Blinova and M. M{\"o}tt{\"o}nen and Hall, {D. S.}",
year = "2019",
month = "10",
day = "16",
doi = "10.1103/PhysRevLett.123.163003",
language = "English",
volume = "123",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "16",

}

Ollikainen, T, Blinova, A, Möttönen, M & Hall, DS 2019, 'Decay of a Quantum Knot', Physical Review Letters, vol. 123, no. 16, 163003. https://doi.org/10.1103/PhysRevLett.123.163003

Decay of a Quantum Knot. / Ollikainen, T. (Corresponding Author); Blinova, A.; Möttönen, M.; Hall, D. S.

In: Physical Review Letters, Vol. 123, No. 16, 163003, 16.10.2019.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Decay of a Quantum Knot

AU - Ollikainen, T.

AU - Blinova, A.

AU - Möttönen, M.

AU - Hall, D. S.

PY - 2019/10/16

Y1 - 2019/10/16

N2 - We experimentally study the dynamics of quantum knots in a uniform magnetic field in spin-1 Bose-Einstein condensates. The knot is created in the polar magnetic phase, which rapidly undergoes a transition toward the ferromagnetic phase in the presence of the knot. The magnetic order becomes scrambled as the system evolves, and the knot disappears. Strikingly, over long evolution times, the knot decays into a polar-core spin vortex, which is a member of a class of singular SO(3) vortices. The polar-core spin vortex is stable with an observed lifetime comparable to that of the condensate itself. The structure is similar to that predicted to appear in the evolution of an isolated monopole defect, suggesting a possible universality in the observed topological transition.

AB - We experimentally study the dynamics of quantum knots in a uniform magnetic field in spin-1 Bose-Einstein condensates. The knot is created in the polar magnetic phase, which rapidly undergoes a transition toward the ferromagnetic phase in the presence of the knot. The magnetic order becomes scrambled as the system evolves, and the knot disappears. Strikingly, over long evolution times, the knot decays into a polar-core spin vortex, which is a member of a class of singular SO(3) vortices. The polar-core spin vortex is stable with an observed lifetime comparable to that of the condensate itself. The structure is similar to that predicted to appear in the evolution of an isolated monopole defect, suggesting a possible universality in the observed topological transition.

UR - http://www.scopus.com/inward/record.url?scp=85073818344&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.123.163003

DO - 10.1103/PhysRevLett.123.163003

M3 - Article

AN - SCOPUS:85073818344

VL - 123

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 16

M1 - 163003

ER -

Ollikainen T, Blinova A, Möttönen M, Hall DS. Decay of a Quantum Knot. Physical Review Letters. 2019 Oct 16;123(16). 163003. https://doi.org/10.1103/PhysRevLett.123.163003