Gallemí Paulet, JaumeMuñoz Mateo, AntonioMayol Sánchez, RicardoGuilleumas, Montserrat2016-07-202016-07-202016-01-181367-2630https://hdl.handle.net/2445/100686Coherent quantum phase slip consists in the coherent transfer of vortices in superfluids. We investigate this phenomenon in two miscible coherently coupled components of a spinor Bose gas confined in a toroidal trap. After imprinting different vortex states, i.e. states with quantized circulation, on each component, we demonstrate that during the whole dynamics the system remains in a linear superposition of two current states in spite of the nonlinearity, and can be mapped onto a linear Josephson problem. We propose this system as a good candidate for the realization of a Mooij-Harmans qubit and remark its feasibility for implementation in current experiments with 87Rb, since we have used values for the physical parameters currently available in laboratories.12 p.application/pdfeng(c) IOP Publishing Ltd and Deutsche Physikalische Gesellschaft, 2016FísicaSuperconductivitatPhysicsSuperconductivityinfo:eu-repo/semantics/article6552672016-07-20info:eu-repo/semantics/openAccess