Optimal persistent currents for interacting bosons on a 1D ring with a gauge field
J.-Prof Dr. Matteo Rizzi (Mainz)

We study persistent currents for interacting one-dimensional (1D) bosons on a tight ring trap, subjected to a rotating barrier potential, which induces an artificial \(U(1)\) gauge field.
We show that, at intermediate interactions, the persistent current response is maximal, due to a subtle interplay of effects due to the barrier, the interaction and quantum fluctuations.
These results are relevant for ongoing experiments with ultracold atomic gases on mesoscopic rings.