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| Poster (Other) | FZJ-2024-06031 |
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2024
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Please use a persistent id in citations: doi:10.34734/FZJ-2024-06031
Abstract: Quantum bit control systems using room temperature electronics provide universities and research institutions with a cost-effective entry into quantum computing. Various approaches address the need for straightforward qubit controllers, particularly those based on AMD’s next-generation RFSoC FPGA, which integrate adaptive SoCs with internal ADCs and DACs. As superconducting qubit architectures advance to incorporate flux elements for direct Z axis control and the number of qubits grows, the demand for high-quality and numerous control channels increases. Within the project QSolid - Quantum Computer in the Solid State, a quantum computer demonstrator integrates a coupled ladder geometry qubit architecture demanding a significant higher number of flux lines. This paper explores the requirements for integrating and expanding the "QiController" electronics from Karlsruhe Institute of Technology. The new system includes up to ten additional cards capable of driving a total of 240 direct flux lines, utilizing low-latency DACs from Analog Devices with peripheral FPGAs. Our joint system design leverages the modularity, scalability, and thermal management of the industrial Standard ATCA, ensuring robust performance and ease of maintenance in this multi-FPGA setup. Initial unit tests of the electronics show promising improvements in noise levels and quality, suggesting that future verification on real qubit devices could establish this approach as a viable solution for scalable room-temperature control hardware. Developing a qubit control demonstrator for the 30-qubit device provides fundamental insights into transforming these room-temperature electronics into a scalable, integrated cryogenic solution.
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