Propagating Ferrodark Solitons in a Superfluid: Exact Solutions and Anomalous Dynamics

Abstract

Exact propagating topological solitons are found in the easy-plane phase of ferromagnetic spin-1 Bose-Einstein condensates, manifesting themselves as kinks in the transverse magnetization. Propagation is only possible when the symmetry-breaking longitudinal magnetic field is applied. Such solitons have two types: a low energy branch with positive inertial mass and a higher branch solution with negative inertial mass. Both types become identical at the maximum speed, a new speed bound that is different from speed limits set by the elementary excitations. The physical mass, which accounts for the number density dip, is negative for both types. In a finite one-dimensional system subject to a linear potential, the soliton undergoes oscillations caused by transitions between the two types occurring at the maximum speed.

4+3 pages, 8 figures

References in corpus (6)

• Spontaneous symmetry breaking in a quenched ferromagnetic spinor Bose condensate
• Emergence of coherence in a uniform quasi-two-dimensional Bose gas
• Stabilization of Solitons Generated by a Supersonic Flow of Bose-Einstein Condensate Past an Obstacle
• Magnetic solitons in Rabi-coupled Bose-Einstein condensates
• Observation of a strongly ferromagnetic spinor Bose-Einstein condensate
• Bi-directional universal dynamics in a spinor Bose gas close to a non-thermal fixed point

Cited by in corpus (9)

• Oscillating Solitons and AC Josephson Effect in Ferromagnetic Bose-Bose Mixtures
• Bloch Oscillations of a Soliton in a 1D Quantum Fluid
• Self-Adapted Josephson Oscillation of Dark-Bright Solitons under Constant Forces
• Absence of the breakdown of ferrodark solitons exhibiting a snake instability
• Core structure of static ferrodark solitons in a spin-1 Bose-Einstein condensate
• Coupled-cluster theory for trapped bosonic mixtures
• Motion of ferrodark solitons in trapped superfluids: spin corrections and emergent oscillators
• Phase domain walls in coherently driven Bose-Einstein condensates
• Observation of sine-Gordon-like solitons in a spinor Bose-Einstein condensate