Nb-based superconductive electronics for future superconducting digital computing
As we rapidly advance through the information age, the amount of power consumed by computers, data centers, and networks grows exponentially. This has inspired a race to develop alternative low-power computational technologies. Superconducting computing has been recognized as a promising solution for the post-Moore era, which shows ultrafast and low-power switching characteristics. Significant progress has been made in developing superconducting systems based on low-TC superconductors. Superconducting single flux quantum (SFQ) logic is one of the superconducting systems, which offers the potential for low-latency operation with energy dissipation of the order of attojoules per gate. This presentation will discuss three critical components of SFQ circuits: LC resonator, superconducting quantum interference device(SQUID), and single-flux-quantum (SFQ)/DC converter. The performance of superconducting devices is strongly dependent on the design and control of their inductance and capacitance. It is essential to carefully select appropriate values of these circuit parameters to achieve high performance and energy efficiency in superconducting circuits. To accomplish this, we calculate self and mutual inductance, compare the performance with and without a ground plane, and carefully control the measurement environment. These factors are critical to the successful development and optimization of superconducting devices.