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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 | | Abstract: | 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 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 | | Services: | Forum | Review | PDF | Favorites | |
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