title: Optimal persistent currents for interacting bosons on a ring with a gauge field.
abstract: We study persistent currents for interacting one-dimensional 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.
authors: Université Grenoble Alpes, LPMMC, F-38000 Grenoble, France and CNRS, LPMMC, F-38000 Grenoble, France.
authors: Marco
authors: M
authors: Cominotti
authors: NEST, Scuola Normale Superiore and Istituto Nanoscienze-CNR, I-56126 Pisa, Italy.
authors: Davide
authors: D
authors: Rossini
authors: Institut für Physik, Johannes-Gutenberg-Universität Mainz, Staudingerweg 7, D-55099 Mainz, Germany.
authors: Matteo
authors: M
authors: Rizzi
authors: Université Grenoble Alpes, LPMMC, F-38000 Grenoble, France and CNRS, LPMMC, F-38000 Grenoble, France.
authors: Frank
authors: F
authors: Hekking
authors: Université Grenoble Alpes, LPMMC, F-38000 Grenoble, France and CNRS, LPMMC, F-38000 Grenoble, France.
authors: Anna
authors: A
authors: Minguzzi