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Ring dark solitons ...
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Wang, WenlongKTH,Kondenserade materiens teori
(author)
Ring dark solitons in three-dimensional Bose-Einstein condensates
- Article/chapterEnglish2019
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American Physical Society,2019
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Numbers
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LIBRIS-ID:oai:DiVA.org:kth-265443
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https://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-265443URI
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https://doi.org/10.1103/PhysRevA.100.053621DOI
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Language:English
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Summary in:English
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Subject category:ref swepub-contenttype
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Subject category:art swepub-publicationtype
Notes
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QC 20191218
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In this work we present a systematic study of the three-dimensional extension of the ring dark soliton, examining its existence, stability, and dynamics in isotropic harmonically trapped Bose-Einstein condensates. Detuning the chemical potential from the linear limit, the ring dark soliton becomes unstable immediately but can be fully stabilized by an external cylindrical potential. The ring has a large number of unstable modes which are analyzed through spectral stability analysis. Furthermore, a few typical destabilization dynamical scenarios are revealed with a number of interesting vortical structures emerging, such as the two or four coaxial parallel vortex rings. In the process of considering the stability of the structure, we also develop a modified version of the degenerate perturbation theory method for characterizing the spectra of the coherent structure. This semianalytical method can be reliably applied to any soliton with a linear limit to explore its spectral properties near this limit. The good agreement of the resulting spectrum is illustrated via a comparison with the full numerical Bogolyubov-de Gennes spectrum. The application of the method to the two-component ring dark-bright soliton is also discussed.
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Added entries (persons, corporate bodies, meetings, titles ...)
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Kevrekidis, P. G.Univ Massachusetts, Dept Math & Stat, Amherst, MA 01003 USA.
(author)
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Babaev, EgorKTH,Kondenserade materiens teori(Swepub:kth)u1fe570h
(author)
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KTHKondenserade materiens teori
(creator_code:org_t)
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In:Physical Review A: covering atomic, molecular, and optical physics and quantum information: American Physical Society100:52469-99262469-9934
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