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Fluctuation and interaction induced instability of dark solitons in single and binary condensates

Authors :
Arko Roy
Dilip Angom
Publication Year :
2014
Publisher :
arXiv, 2014.

Abstract

We show that the presence of soliton in a single-species condensate, at zero temperature, enhances the quantum depletion sufficient enough to induce dynamical instability of the system. We also predict that for two-species condensates, two Goldstone modes emerge in the excitation spectrum at phase separation. Of these, one is due to the presence of the soliton. We use Hartree-Fock-Bogoliubov theory with Popov approximation to examine the mode evolution, and demonstrate that when the anomalous mode collides with a higher energy mode it renders the solitonic state oscillatory unstable. We also report soliton induced change in the topology of the density profiles of the two-species condensates at phase-separation.<br />Comment: arXiv admin note: text overlap with arXiv:1307.5716

Details

Database :
OpenAIRE
Accession number :
edsair.doi.dedup.....435eb51bfcaea4bd792f65665da805c9
Full Text :
https://doi.org/10.48550/arxiv.1405.6459