Dissociation dynamics of singly charged vortices into half-quantum vortex pairs

F. Manni, K. G. Lagoudakis, T. C. H. Liew, R. André, V. Savona, B. Deveaud

Research output: Contribution to journalArticle

32 Citations (Scopus)

Abstract

The quest for identification and understanding of fractional vorticity is a major subject of research in the quantum fluids domain, ranging from superconductors, superfluid Helium-3 to cold atoms. In a two-dimensional Bose degenerate gas with a spin degree of freedom, the fundamental topological excitations are fractional vortical entities, called half-quantum vortices. Convincing evidence for the existence of half-quantum vortices was recently provided in spinor polariton condensates. The half-quantum vortices can be regarded as the fundamental structural components of singly charged vortices but, so far, no experimental evidence of this relation has been provided. Here we report on the direct and time-resolved observation of the dynamical process of the dissociation of a singly charged vortex into its primary components, a pair of half-quantum vortices. The physical origin of the observed phenomenology is found in a spatially inhomogeneous static potential that couples the two spin components of the condensate.
LanguageEnglish
Article number1309
Number of pages7
JournalNature Communications
Volume3
DOIs
Publication statusPublished - 1 Dec 2012

Fingerprint

Helium
Vortex flow
Gases
Observation
dissociation
vortices
Research
condensates
Superfluid helium
helium isotopes
Vorticity
phenomenology
polaritons
vorticity
Superconducting materials
Superconductivity
degrees of freedom
Atoms
Fluids
fluids

Keywords

  • condensed matter
  • physical sciences
  • dissociation dynamics
  • quantum fluids
  • vortices

Cite this

Manni, F. ; Lagoudakis, K. G. ; Liew, T. C. H. ; André, R. ; Savona, V. ; Deveaud, B. / Dissociation dynamics of singly charged vortices into half-quantum vortex pairs. In: Nature Communications. 2012 ; Vol. 3.
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Dissociation dynamics of singly charged vortices into half-quantum vortex pairs. / Manni, F.; Lagoudakis, K. G.; Liew, T. C. H.; André, R.; Savona, V.; Deveaud, B.

In: Nature Communications, Vol. 3, 1309, 01.12.2012.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Dissociation dynamics of singly charged vortices into half-quantum vortex pairs

AU - Manni, F.

AU - Lagoudakis, K. G.

AU - Liew, T. C. H.

AU - André, R.

AU - Savona, V.

AU - Deveaud, B.

PY - 2012/12/1

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AB - The quest for identification and understanding of fractional vorticity is a major subject of research in the quantum fluids domain, ranging from superconductors, superfluid Helium-3 to cold atoms. In a two-dimensional Bose degenerate gas with a spin degree of freedom, the fundamental topological excitations are fractional vortical entities, called half-quantum vortices. Convincing evidence for the existence of half-quantum vortices was recently provided in spinor polariton condensates. The half-quantum vortices can be regarded as the fundamental structural components of singly charged vortices but, so far, no experimental evidence of this relation has been provided. Here we report on the direct and time-resolved observation of the dynamical process of the dissociation of a singly charged vortex into its primary components, a pair of half-quantum vortices. The physical origin of the observed phenomenology is found in a spatially inhomogeneous static potential that couples the two spin components of the condensate.

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KW - physical sciences

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KW - quantum fluids

KW - vortices

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