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arXiv:cond-mat/0410421

Incoherent matter-wave solitons: Mutual self-trapping of a Bose-Einstein condensate and its surrounding thermal cloud

Hrvoje Buljan, Mordechai Segev, Ami Vardi

Published Oct 17, 2004• 0 citations
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Abstract

We show that a Bose-Einstein condensate and a portion of its surrounding thermal cloud can exhibit mutual self-trapping, supported by the attractive particle interactions, and not by the external confinement. This type of dynamics is characteristic of composite random-phase solitons.
DOI
10.48550/arxiv.cond-mat/0410421

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We consider the dynamics of a dark soliton in an elongated harmonically trapped Bose-Einstein condensate. A central question concerns the behavior at finite temperatures, where dissipation arises due to the presence of a thermal cloud. We study this problem using coupled Gross-Pitaevskii and N-body simulations, which include the mean field coupling between the condensate and thermal cloud. We find that the soliton decays relatively quickly even at very low temperatures, with the decay rate increasing with rising temperature. PACS numbers: 03.75.Lm, 05.45.Yv, 67.80.Gb 1.
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