US Patent 11664801 Multi-qubit architectures with mode-selective charge coupling between novel fluxonium-molecule qubits

A qubit structure includes a first fluxonium qubit having a first Josephson Junction (JJ) in parallel with a first capacitor and a first superconducting inductor. A second fluxonium qubit includes a second JJ in parallel with a second capacitor and a second superconducting inductor, coupled in series with the first fluxonium qubit. A third capacitor is coupled in parallel to the series first and second fluxonium qubits.