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: Univ Trento, Dipartimento Fis, INO CNR BEC Ctr, I-38123 Povo, Italy; Ist Nazl Fis Nucl, TIFPA, I-38123 Povo, Italy; CNR Nanotec, Inst Nanotechnol, Via Monteroni, I-73100 Lecce, 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 (2)      Pages from: 023326-1  to: 023326-7

More Information: We thank I. Carusotto and P. Hauke for fruitful discussions. We acknowledge fundings from INFN through the FISH project, from the European Union´s Horizon 2020 Programme through the NAQUAS project of QuantERA ERA-NET Cofund in Quantum Technologies (Grant Agreement No. 731473), from Italian MIUR under the PRIN2017 project CEnTraL (Protocol No. 20172H2SC4), and from Provincia Autonoma di Trento. We thank the BEC Center in Trento, the Q@TN initiative, and QuTip.
KeyWords: Inhomogeneous spin systems, BEC mixtures
DOI: 10.1103/PhysRevA.104.023326

Citations: 15
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