Abstract
We study the linear stability and collision characteristics of the solitons of the Bose–Einstein condensates (BECs) trapped in two barrier potentials. It is shown that the soliton obtained at the top of the barrier potential is stable. Especially, when the two barrier potentials are considered as the output source of the dark solitons, the collision spots and pattern (such as chase, head-on or localization and through collision) of two solitons may be manipulated by the height of the barrier potential.
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