A Co-designed Control and Measurement Architecture for Hybrid Superconducting-Semiconducting Qubit Systems (Part 2)

Electrons confined in quantum dots are a promising candidate for quantum computing, but their scalability has posed challenges. Interconnects comprising superconducting elements could resolve the routing bottleneck by leveraging the size and customization of superconducting architectures in order to connect groups of triple quantum dots. Previous works have utilized a high-impedance superconducting resonator to facilitate coupling between quantum dots [1]. Our coupling elements will involve superconducting qubits, such as non-linear elements [2], alleviating the need for high-impedance resonators. In this work, we co-design a system for the operation of such hybrid quantum systems, tackling hardware-specific challenges such as microwave hygiene and dense routing within a vector-magnet bore. We seek to establish engineering best practices for a hybrid-system infrastructure that enables these new approaches. Part 2 of this talk will discuss measurement results using this architecture and characterization of signal integrity.



[1] Bøttcher, C. G. L. et al., Nature Communications, 13 (2022)

[2] Kang, H. H. et al., arXiv:2409.08915