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28 March 2024
 
  » arxiv » 1101.5998

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Interface dynamics of a two-component Bose-Einstein condensate driven by an external force
D. Kobyakov ; V. Bychkov ; E. Lundh ; A. Bezett ; V. Akkerman ; M. Marklund ;
Date 31 Jan 2011
AbstractThe 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 the 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.
Source arXiv, 1101.5998
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