SuperNPU: An extremely fast neural processing unit using superconducting logic devices

K Ishida, I Byun, I Nagaoka, K Fukumitsu… - 2020 53rd Annual …, 2020 - ieeexplore.ieee.org
Superconductor single-flux-quantum (SFQ) logic family has been recognized as a highly
promising solution for the post-Moore's era, thanks to its ultra-fast and low-power switching …

Scalable flux controllers using adiabatic superconductor logic for quantum processors

N Takeuchi, T Yamae, W Luo, F Hirayama… - Physical Review …, 2023 - APS
Quantum processors have the potential to accelerate specific computing tasks but are
difficult to scale up due to engineering limitations, such as the number of available cables …

Energy efficient half-flux-quantum circuit aiming at milli-kelvin stage operation

F Li, D Pham, Y Takeshita, M Higashi… - Superconductor …, 2023 - iopscience.iop.org
Abstract Half-flux-quantum (HFQ) circuits are based on 0–π superconducting quantum
interference devices (SQUIDs) and is one of the energy-efficient superconductor digital …

Superconducting circuits without inductors based on bistable Josephson junctions

II Soloviev, VI Ruzhickiy, SV Bakurskiy, NV Klenov… - Physical Review …, 2021 - APS
Magnetic flux quantization in superconductors allows the implementation of fast and energy-
efficient digital superconducting circuits. However, information representation in magnetic …

Design and fabrication of low-power single-flux-quantum circuits toward quantum bit control

M Tanaka, Y Kitagawa, T Satoh… - IEEE Transactions on …, 2023 - ieeexplore.ieee.org
We report low-power single-flux-quantum (SFQ) circuits fabricated with a lowered critical
current density process and low-voltage design. We selected 250 A/cm to obtain 2–10 μA …

Planarized Process for Single-Flux-Quantum Circuits With Self-Shunted Nb/NbSi/Nb Josephson Junctions

D Olaya, M Castellanos-Beltran… - IEEE Transactions …, 2019 - ieeexplore.ieee.org
We describe our process for fabricating single-flux-quantum circuits for applications in
communications metrology, advanced computing, and quantum information. The process …

Phase logic based on π Josephson junctions

AA Maksimovskaya, VI Ruzhickiy, NV Klenov… - JETP Letters, 2022 - Springer
The transition to Josephson digital circuits with the representation of information in the form
of phase jumps of the superconducting order parameter on heterostructures promises a …

XQsim: modeling cross-technology control processors for 10+ K qubit quantum computers

I Byun, J Kim, D Min, I Nagaoka, K Fukumitsu… - Proceedings of the 49th …, 2022 - dl.acm.org
10+ K qubit quantum computer is essential to achieve a true sense of quantum supremacy.
With the recent effort towards the large-scale quantum computer, architects have revealed …

50-GFLOPS floating-point adder and multiplier using gate-level-pipelined single-flux-quantum logic with frequency-increased clock distribution

I Nagaoka, R Kashima, M Tanaka… - IEEE Transactions …, 2023 - ieeexplore.ieee.org
We demonstrate the functioning of a high-throughput, gate-level-pipelined floating-point
adder and multiplier over 50 GHz. The gate-level-pipelined floating-point adder and …

[PDF][PDF] 国际单位制变革与电磁测量发展互促共赢

李世松, 赵伟, 黄松岭, 白静芬 - 中国电机工程学报, 2021 - researchgate.net
从2019 年5 月20 日起, 新国际单位制(international system of units, SI) 在全世界正式启用.
在新的单位体系下, 7 个SI 基本单位首次实现了全部采用基于基本物理常数的定义 …