Resource-Efficient Control Scheme for Superconducting Quantum Processors Compatible with Unipolar Flux Pulsing

State-of-the-art quantum computers based on superconducting qubits require the continuous delivery of high-fidelity flux pulses to perform fast and accurate two-qubit gates. Furthermore, scaling to larger systems demands innovations in control techniques to reduce wiring overhead and system complexity. Conventional setups typically use individual lines to deliver microwave, flux bias and readout signals, each adding to cost and complexity, thereby limiting scalability. In this work, we present a unified control scheme that combines multiple signals into a single line at room temperature to reduce the cryogenic cable count. A central element of our control system is a custom-engineered bias tee. We study flux pulse quality in terms of 1/f noise suppression, pulse distortion and the repeatability of sequences of unipolar flux pulses pre-compensated for distortions characterized at room temperature using cryoscope techniques. Our findings show that gains in resource efficiency of control schemes are achievable while maintaining signal integrity.