Parametrically excited star-shaped patterns at the interface of binary Bose-Einstein condensates

  title={Parametrically excited star-shaped patterns at the interface of binary Bose-Einstein condensates},
  author={Dilip Kumar Maity and Kaushiki Mukherjee and Simeon Mistakidis and S. Das and Panayotis G. Kevrekidis and Sonjoy Majumder and Peter Schmelcher},
  journal={Physical Review A},
A Faraday-wave-like parametric instability is investigated via mean-field and Floquet analysis in immiscible binary Bose-Einstein condensates. The condensates form a so-called \textit{ball-shell} structure in a two-dimensional harmonic trap. To trigger the dynamics, the scattering length of the core condensate is periodically modulated in time. We reveal that in the dynamics the interface becomes unstable towards the formation of oscillating patterns. The interface oscillates sub-harmonically… 
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