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Coherent quantum phase slip in two-component bosonic atomtronic circuits

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Coherent 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.

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(c) IOP Publishing Ltd and Deutsche Physikalische Gesellschaft, 2016

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Articles publicats en revistes (Física Quàntica i Astrofísica)

# metadata.dc.title[].value
Coherent quantum phase slip in two-component bosonic atomtronic circuits