Modeling and Evaluating Superconducting Ferroelectric SQUID Circuits

Ferroelectric Superconducting Quantum Interference Device (Fe-SQUID) has recently emerged as a viable option to realize superconducting computing due to its voltage-controlled switching, which is essential to build large-scale digital circuits. This is the first work to model Fe-SQUID-based logic circuits and develop standard cell libraries compatible with existing EDA tool flows. We provide a comprehensive evaluation of the power consumption and performance of a wide range of Fe-SQUID-based circuits, benchmarking them against the state-of-the-art 5 nm FinFET-based circuits. Our 5 nm FinFET transistor model is validated against industrial measurements. The validation is conducted not only at room temperature but also at extremely low temperatures, down to 10K, for fair comparisons against Fe-SQUID superconducting circuits. Our findings revealed that contrary to CMOS-based circuits, circuits realized using Fe-SQUID dissipate significantly more power. This presents a substantial challenge within the constraints of limited cooling power budgets in state-of-the-art cryostats. Open source: we will release our developed Fe-SQUID compact model, Fe-SQUID standard cell libraries, and Fe-SQUID-based circuits and make them publicly available in a github repository