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Dark-bright solitons in Bose-Einstein condensates at finite temperatures.
- Source :
-
New Journal of Physics . 2012, Vol. 14 Issue 5, p1-24. 24p. - Publication Year :
- 2012
-
Abstract
- We study the dynamics of dark-bright (DB) solitons in binary mixtures of Bose gases at finite temperature using a system of two coupled dissipative Gross-Pitaevskii equations. We develop a perturbation theory for the two-component system to derive an equation of motion for the soliton centers and identify different temperature-dependent damping regimes. We show that the effect of the bright ('filling') soliton component is to partially stabilize 'bare' dark solitons against temperature-induced dissipation, thus providing longer lifetimes. We also study analytically thermal effects on DB soliton 'molecules' (i.e. two in-phase and out-of-phase DB solitons), showing that they undergo expanding oscillations while interacting. Our analytical findings are in good agreement with results obtained via a Bogoliubov-de Gennes analysis and direct numerical simulations. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 13672630
- Volume :
- 14
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- New Journal of Physics
- Publication Type :
- Academic Journal
- Accession number :
- 77462076
- Full Text :
- https://doi.org/10.1088/1367-2630/14/5/055006