Drag-induced dynamical formation of dark solitons in Bose mixture on a ring

Abstract

Andreev-Bashkin drag plays a very important role in multiple areas such as superfluid mixtures, superconductors, and dense nuclear matter. Here we point out that the drag phenomenon can be also important in the physics of solitons, ubiquitous objects arising in a wide array of fields ranging from tsunami waves and fiber-optic communication to biological systems. So far, fruitful studies have been conducted in ultracold atomic systems where nontrivial soliton dynamics occurred due to intercomponent density-density interaction. In this work we show that current-current coupling between components (Andreev-Bashkin drag) can lead to a substantially different kind of effect, unsupported by density-density interactions, such as a drag-induced dark soliton generation. This also points out that soliton dynamics can be used as a tool to experimentally study the dissipationless drag effect.