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Creation and counting of defects in a temperature-quenched Bose-Einstein condensate

  Articoli su Riviste JCR/ISI  (anno 2016)

Autori:  Donatello S., Serafini S., Bienaimé T, Dalfovo F., Lamporesi G., Ferrari G

Affiliazione Autori:  1) INO-CNR BEC Center and Dipartimento di Fisica, Universit`a di Trento, 38123 Povo, Italy 2) Trento Institute for Fundamental Physics and Applications, INFN, 38123 Povo, Italy

Riassunto:  We study the spontaneous formation of defects in the order parameter of a trapped ultracold bosonic gas while crossing the critical temperature for Bose-Einstein condensation at different rates. The system has the shape of an elongated ellipsoid, whose transverse width can be varied. For slow enough temperature quenches we find a power-law scaling of the average defect number with the quench rate, as predicted by the Kibble-Zurek mechanism. A breakdown of such a scaling is found for fast quenches, leading to a saturation of the average defect number. We suggest an explanation for this saturation in terms of the mutual interactions among defects.

Rivista/Giornale:  PHYSICAL REVIEW A
Volume n.:  94      Pagine da: 023628-1  a: 023628-8

*Impact Factor della Rivista: (2016) 2.925
data tratti da "WEB OF SCIENCE" (marchio registrato di Thomson Reuters) ed aggiornati a:  26/05/2019

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