Interface dynamics of a two-component Bose-Einstein condensate driven by an external force
2011 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 83, no 4, 043623- p.Article in journal (Refereed) Published
The dynamics of an interface in a two-component Bose-Einstein condensate driven by a spatially uniform time-dependent force is studied. Starting from the Gross-Pitaevskii Lagrangian, the dispersion relation for linear waves and instabilities at the interface is derived by means of a variational approach. A number of diverse dynamical effects for different types of driving force is demonstrated, which includes the Rayleigh-Taylor instability for a constant force, the Richtmyer-Meshkov instability for a pulse force, dynamic stabilization of the Rayleigh-Taylor instability and onset of the parametric instability for an oscillating force. Gaussian Markovian and non-Markovian stochastic forces are also considered. It is found that the Markovian stochastic force does not produce any average effect on the dynamics of the interface, while the non-Markovian force leads to exponential perturbation growth.
Place, publisher, year, edition, pages
American Physical Society , 2011. Vol. 83, no 4, 043623- p.
two-component bose-einstein condensate
Condensed Matter Physics
IdentifiersURN: urn:nbn:se:umu:diva-43430DOI: 10.1103/PhysRevA.83.043623OAI: oai:DiVA.org:umu-43430DiVA: diva2:413703