Stable multidimensional soliton stripes in two-component Bose–Einstein condensates

We discuss how to construct stable multidimensional extensions of one-dimensional dark solitons, the so-called soliton stripes, in two-species Bose–Einstein condensates in the immiscible regime. We show how using a second component to fill the core of a dark soliton stripe leads to reduced instabilities while propagating in homogeneous media. We also discuss how in the presence of a trap arbitrarily long-lived dark soliton stripes can be constructed by increasing the filling of the dark stripe core. Numerical evidences of the robustness of the dark soliton stripes in collision scenarios are also provided.

► Soliton-stripes (multidimensional extensions of dark solitons) are constructed in multicomponent BECs.
► A second component filling the core of the stripe leads to reduced instabilities while propagating in homogeneous media.
► In the presence of a trap arbitrarily long-lived stripes can be constructed by increasing the core filling.