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Vortex Reconnections and Rebounds in Trapped Atomic Bose-Einstein Condensates

  Articoli su Riviste JCR/ISI  (anno 2017)

Autori:  Serafini S., Galantucci L., Iseni E., Bienaimé T., Bisset R.N. , Barenghi C.F., Dalfovo F., Lamporesi G., Ferrari G

Affiliazione Autori:  1) INO-CNR BEC Center and Dipartimento di Fisica, Università di Trento, 38123 Povo, Italy 2) Joint Quantum Centre (JQC) Durham-Newcastle, and School of Mathematics and Statistics, Newcastle University, Newcastle upon Tyne NE1 7RU, United Kingdom

Riassunto:  Reconnections and interactions of filamentary coherent structures play a fundamental role in the dynamics of fluids, redistributing energy and helicity among the length scales and inducing fine-scale turbulent mixing. Unlike ordinary fluids, where vorticity is a continuous field, in quantum fluids vorticity is concentrated into discrete (quantized) vortex lines turning vortex reconnections into isolated events, making it conceptually easier to study. Here, we report experimental and numerical observations of three-dimensional quantum vortex interactions in a cigar-shaped atomic Bose-Einstein condensate. In addition to standard reconnections, already numerically and experimentally observed in homogeneous systems away from boundaries, we show that double reconnections, rebounds, and ejections can also occur as a consequence of the nonhomogeneous, confined nature of the system.

Rivista/Giornale:  PHYSICAL REVIEW X
Volume n.:  7      Pagine da: 021031-1  a: 021031-12
Parole chiave: Reconnection - Vortex interaction
Collegamento Web del Prodotto: Clicca qui


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