Spontaneous formation of bright solitons in self-localized impurities in Bose-Einstein condensate

Abdelaali Boudjemaa

doi:10.1016/j.cnsns.2015.09.003

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arXiv · 1507.02552

Spontaneous formation of bright solitons in self-localized impurities in Bose-Einstein condensate

Abdelaali Boudjemaa

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Abstract

We study the formation of bright solitons in the impurity component of Bose-Einstein condensate (BEC)-impurity mixture by using the time-dependent Hartree-Fock-Bogoliubov theory. While we assume the boson-boson and impurity-boson interactions to be effectively repulsive, their character can be changed spontaneously from repulsive to attractive in the presence of strong anomalous correlations. In such a regime the impurity component becomes a system of effectively attractive atoms leading automatically to the generation of bright solitons. We find that this soliton decays at higher temperatures due to the dissipation induced by the impurity-host and host-host interactions. We show that after a sudden increase of the impurity-boson strength a train of bright solitons is produced and this can be interpreted in terms of the modulational instability (MI) of the time-dependent impurity wave function.

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BibTeX RIS

Abdelaali Boudjemaa. 2015-07-08. Spontaneous formation of bright solitons in self-localized impurities in Bose-Einstein condensate. https://doi.org/10.1016/j.cnsns.2015.09.003

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