Full-stack architecture of fluxonium (IMAGE)
Caption
(a) Schematic of the fluxonium circuit, consisting of a Josephson junction (critical current Ic), a loop inductor (L), and a shunt capacitor (C). (b) Optical micrograph of a typical fluxonium qubit device. (c) Scanning electron microscopy (SEM)image of the qubit loop structure, highlighting the Josephson junction and junction array (blue box in (b)). (d) SEM images of the Josephson junction (orange box) and the junction array (green box). (e) Qubit eigenstate wavefunctions and energies are on a phase basis. (f) Transition matrix elements of the flux (Φ ) and charge (Q ) operators.
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