Half-vortex sheets and domain-wall trains of rotating two-component Bose-Einstein condensates in spin-dependent optical lattices

TL;DR

This paper explores the formation and control of half-vortex sheets and domain-wall trains with spin textures in rotating two-component Bose-Einstein condensates within spin-dependent optical lattices, revealing stable configurations and manipulable textures.

Contribution

It introduces a novel stable vortex configuration and demonstrates how to manipulate spin textures via experimental parameters in two-component BECs.

Findings

Stable straight half-vortex sheets formed in the condensates.

Periodic 'eyebrow-like' spin textures embedded on domain walls.

Textures can be controlled by intercomponent interaction, rotation frequency, and lattice period.

Abstract

We investigate half-vortex sheets and domain-wall trains of rotating two-component Bose-Einstein condensates in spin-dependent optical lattices. The two-component condensates undergo phase separation in the form of stripes arranged alternatively. The vortices of one component are aligned in lines in the low-density regions and filled with the other component, which results in a stable vortex configuration, straight half-vortex sheets. A train of novel domain walls, with spatially periodic "eyebrow-like" spin textures embedded on them, are formed at the interfaces of the two components. We reveal that these spatially periodic textures on the domain walls result from the linear gradient of the relative phase, which is induced by the alternating arrangement of the vortex sheets in the two components. An accurate manipulation of the textures can be realized by adjusting the intercomponent interaction strength, the rotating angular frequency and the period of the optical lattices.