Scientific Results

Manipulation of an elongated internal Josephson junction of bosonic atoms

Year: 2021

Authors: Farolfi A., Zenesini A., Cominotti R., Trypogeorgos D., Recati A., Lamporesi G., Ferrari G.

Autors Affiliation: INO-CNR BEC Center, Dipartimento di Fisica, Università di Trento and TIFPA-INFN, 38123 Povo, Italy

Abstract: We report on the experimental characterization of a spatially extended Josephson junction realized with a coherently coupled two-spin-component Bose-Einstein condensate. The cloud is trapped in an elongated potential such that transverse spin excitations are frozen. We extract the nonlinear parameter with three different
manipulation protocols. The outcomes are all consistent with a simple local density approximation of the spin hydrodynamics, i.e., of the so-called Bose-Josephson junction equations. We also identify a method to produce states with a well-defined uniform magnetization.

Journal/Review: PHYSICAL REVIEW A

Volume: 104      Pages from: 023326-1  to: 023326-7

KeyWords: Inhomogeneous spin systems, BEC mixtures
DOI: 10.1103/PhysRevA.104.023326

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