Manipulation of an elongated internal Josephson junction of bosonic atoms
A. Farolfi, Alessandro Zenesini, Riccardo Cominotti, Dimitrios Trypogeorgos, Alessio Recati, Giacomo Lamporesi, G. Ferrari
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.
Topics & Concepts
Josephson effectPhysicsBose–Einstein condensateCondensed matter physicsSpin (aerodynamics)Pi Josephson junctionNonlinear systemTransverse planeMagnetizationSimple (philosophy)Quantum mechanicsComponent (thermodynamics)SuperconductivityMagnetic fieldThermodynamicsPhilosophyEngineeringEpistemologyStructural engineeringCold Atom Physics and Bose-Einstein CondensatesAtomic and Subatomic Physics ResearchQuantum Information and Cryptography