Oscillating Solitons and ac Josephson Effect in Ferromagnetic Bose-Bose Mixtures
Sebastiano Bresolin, Arko Roy, G. Ferrari, Alessio Recati, Nicolas Pavloff
Abstract
Close to the demixing transition, the degree of freedom associated with relative density fluctuations of a two-component Bose-Einstein condensate is described by a nondissipative Landau-Lifshitz equation. In the quasi-one-dimensional weakly immiscible case, this mapping surprisingly predicts that a dark-bright soliton should oscillate when subject to a constant force favoring separation of the two components. We propose a realistic experimental implementation of this phenomenon which we interpret as a spin-Josephson effect in the presence of a movable barrier.
Topics & Concepts
PhysicsCondensed matter physicsFerromagnetismSolitonBose–Einstein condensateJosephson effectSpin (aerodynamics)Constant (computer programming)Degrees of freedom (physics and chemistry)Quantum mechanicsSuperconductivityNonlinear systemThermodynamicsProgramming languageComputer scienceCold Atom Physics and Bose-Einstein CondensatesStrong Light-Matter InteractionsQuantum, superfluid, helium dynamics