Tunneling vortex dynamics in linearly coupled Bose-Hubbard rings
Tunneling vortex dynamics in linearly coupled Bose-Hubbard rings
The quantum dynamics of population-balanced fractional vortices and population-imbalanced vortices in an effective two-state bosonic system, made of two coupled discrete circuits with few sites, is addressed within the Bose-Hubbard model. We show that, for low on-site interaction, the tunneling of quantized vortices between the rings performs a coherent, oscillating …