Optimal Persistent Currents for Interacting Bosons on a Ring with a Gauge Field (original) (raw)

Anna Minguzzi

2014, Physical Review Letters

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10 pages

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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.