Superfluidity breakdown of Rabi-coupled two-component Bose-Einstein condensates in optical lattices

We demarcate the unstable regimes of superfluids in a Rabi-coupled two-component Bose-Einstein condensate in the presence of optical lattices. We find that the Rabi coupling can stabilize superfluids. A significant separation between Landau and dynamical instabilities is presented in a Rabi-coupled Zeeman lattice.

Automated summary

The study demonstrates that Rabi coupling can stabilize superfluids in a two-component Bose-Einstein condensate in the presence of optical lattices. Additionally, a significant separation between Landau and dynamical instabilities is observed in a Rabi-coupled Zeeman lattice.