Exploring improved readout in dispersively coupled fluxonium qubits

To scale fluxonium qubits in logical codes, we need both high-fidelity two-qubit gates and also high-fidelity, non-demolition mid-circuit measurements. Recent advances have led to a more detailed understanding of qubit-resonator interactions and are leading the field to better designs. In this presentation, we present measurements of fluxonium in various parameter regions, assessing readout performance to identify optimal configurations while keeping in mind potential tradeoffs. We compare experimental data to theoretical Floquet analysis, and analyze critical photon numbers. These insights will guide future fluxonium qubit design and understanding as a scalable quantum computing platform.