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Please use this identifier to cite or link to this item: https://hdl.handle.net/2445/148458
Tunneling vortex dynamics in linearly coupled Bose-Hybbard rings
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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 dynamics connecting current states with chiral symmetry. The vortex-flux transfer dually follows the usual sinusoidal particle current of the Josephson effect, in good agreement with a mean-field approximation. Within such a regime, the switch of persistent currents in the rings resembles flux-qubit features and is feasible for experimental realization. On the contrary, strong interatomic interactions suppress the chiral current and lead the system into fragmented condensation.
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ESCRIVÀ, Albert, et al. Tunneling vortex dynamics in linearly coupled Bose-Hybbard rings. Physical Review A. 2019. Vol. 100, num. 063621. ISSN 2469-9926. [consulted: 11 of October of 2026]. Available at: https://hdl.handle.net/2445/148458