Fragmentation of a Bose-Einstein Condensate Through Periodic Modulation of the Scattering Length

Abstract

Motivated by recent experimental results on the dynamics of a cigarshaped 7 Li Bose-Einstein condensate subject to periodic modulation of the scattering length, we investigate here the dynamics of the condensate by numerical and analytical means and show that for resonant drives of large amplitude the condensate reaches a fragmented state. The fragmented state is a hybrid state of the condensate which consists of a quadrupole mode on which a longitudinal resonant density wave is grafted.