Exploring the Fluxonium Parameter Space

The fluxonium qubit acts as a promising building block for a quantum computer with fast, high fidelity entangling gates and coherences that have surpassed the millisecond threshold. However, while these records are not unique to "hero devices" and are spread across multiple research labs, the parameters of these devices are fairly localized in the overall fluxonium parameter space. Fluxonium qubits have a rich two-dimensional parameter space where the relative values of the linear and non-linear inductance shape the potential and the capacitance sets the energy scale. In this talk, we explore the literature of experimentally measured fluxonium devices, outlining trends and various limitations on exploring more of the parameter space. We also present preliminary measurements of qubits further charting this space.