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Adiabatic quantum-flux-parametron (AQFP) logic is an energy-efficient superconductor logic family. The latency of AQFP circuits is relatively long compared to that of other superconductor logic families and thus such circuits require…

Emerging Technologies · Computer Science 2021-11-08 Taiki Yamae , Naoki Takeuchi , Nobuyuki Yoshikawa

Adiabatic Quantum-Flux-Parametron (AQFP) logic is an ultra-low-power superconducting logic family with energy consumption approaching the Shannon limit, making it attractive for quantum computing control and cryogenic computing systems.…

Emerging Technologies · Computer Science 2026-04-13 Robert S. Aviles , Ziyu Liu , Jingkai Hong , Sasan Razmkhah , Massoud Pedram , Peter A. Beerel

The Adiabatic Quantum-Flux-Parametron (AQFP) superconducting technology has been recently developed, which achieves the highest energy efficiency among superconducting logic families, potentially huge gain compared with state-of-the-art…

Neural and Evolutionary Computing · Computer Science 2019-07-23 Ruizhe Cai , Ao Ren , Olivia Chen , Ning Liu , Caiwen Ding , Xuehai Qian , Jie Han , Wenhui Luo , Nobuyuki Yoshikawa , Yanzhi Wang

Superconducting circuits, like Adiabatic Quantum-Flux-Parametron (AQFP), offer exceptional energy efficiency but face challenges in physical design due to sophisticated spacing and timing constraints. Current design tools often neglect the…

Adiabatic quantum-flux-parametron (AQFP) circuits can operate with extremely small energy dissipation (~1 zJ per junction at 5 GHz) and high sensitivity (~1 {\mu}A) owing to adiabatic switching. Thus, AQFP logic is suitable to use as…

Applied Physics · Physics 2021-02-25 Naoki Takeuchi , Taiki Yamae , Hideo Suzuki , Nobuyuki Yoshikawa

The production process of superconductive integrated circuits is complex and consumes significant amounts of resources and energy. Therefore, it is crucial to evaluate the environmental impact of this emerging technology. An attractive…

Emerging Technologies · Computer Science 2023-07-25 Masoud Zabihi , Yanyue Xie , Zhengang Li , Peiyan Dong , Geng Yuan , Olivia Chen , Massoud Pedram , Yanzhi Wang

Adiabatic quantum-flux-parametron (AQFP) logic is a proven energy-efficient superconductor technology for various applications. To address the scalability challenges, we investigated AQFP shift registers with the AQFP footprint area reduced…

Adiabatic quantum-flux-parametron (AQFP) logic is an ultra-low-power superconductor logic family. AQFP logic gates are powered and clocked by dedicated clocking schemes using ac excitation currents to implement an energy-efficient switching…

Applied Physics · Physics 2023-01-03 Yuki Hironaka , Taiki Yamae , Christopher L. Ayala , Nobuyuki Yoshikawa , Naoki Takeuchi

Adiabatic quantum-flux-parametron (AQFP) logic is an energy-efficient superconductor logic. It operates with zero static power dissipation and very low dynamic power dissipation owing to adiabatic switching. In previous numerical studies,…

Emerging Technologies · Computer Science 2019-10-29 Taiki Yamae , Naoki Takeuchi , Nobuyuki Yoshikawa

Adiabatic Quantum-Flux-Parametron (AQFP) is a superconducting logic with extremely high energy efficiency. By employing the distinct polarity of current to denote logic `0' and `1', AQFP devices serve as excellent carriers for binary neural…

Adiabatic Quantum-Flux-Parametron (AQFP) logic is a promising emerging device technology with six orders of magnitude lower power than CMOS. However, AQFP is challenged by the fact that every gate must be clocked, where proper data transfer…

Emerging Technologies · Computer Science 2024-09-10 Robert S. Aviles , Peter A. Beerel

The adiabatic quantum-flux parametron (AQFP) is a promising energy-efficient superconducting technology. Before technology mapping, additional buffer and splitter cells need to be inserted into AQFP circuits to fulfill two special…

Logic in Computer Science · Computer Science 2021-09-02 Siang-Yun Lee , Heinz Riener , Giovanni De Micheli

InductEx is a software tool used for the analysis of integrated circuit designs and extraction of design parameters by way of numerical electromagnetic field solving. This tool was originally developed with Rapid Single Flux Quantum (RSFQ)…

Quantum Physics · Physics 2023-09-15 Sean Crowe , Benjamin Taylor , Nicholas Ferrante , Brad Liu , Susan Berggren

Cryogenic qubit controllers (QCs) are the key to build large-scale superconducting quantum processors. However, developing scalable QCs is challenging because the cooling power of a dilution refrigerator is too small (~10 $\mu$W at ~10 mK)…

Applied Physics · Physics 2024-06-04 Naoki Takeuchi , Taiki Yamae , Taro Yamashita , Tsuyoshi Yamamoto , Nobuyuki Yoshikawa

The Landauer limit is to irreversible logic what the Carnot cycle is to heat engines. This limit is approached in the adiabatic Quantum Flux Parametron (aQFP) by copying the inputs of standard logic gates to produce reversible logic gates,…

Applied Physics · Physics 2025-04-08 Quentin Herr

Flux transformers are the necessary component of all superconductor digital integrated circuits utilizing ac power for logic cell excitation and clocking, and flux biasing, e.g., Adiabatic Quantum Flux Parametron (AQFP), Reciprocal Quantum…

Superconductivity · Physics 2023-02-03 Sergey K. Tolpygo

Adiabatic Quantum-Flux-Parametron (AQFP) logic is a promising emerging superconducting technology for ultra-low power digital circuits, offering orders of magnitude lower power consumption than CMOS. However, AQFP scalability is challenged…

Emerging Technologies · Computer Science 2025-10-07 Robert S. Aviles , Peter A. Beerel

As we rapidly advance through the information age, the power consumed by computers, data centers, and networks grows exponentially. This has inspired a race to develop alternative low-power computational technologies. A new adiabatic…

Applied Physics · Physics 2023-05-24 Han Cai , Jay C. LeFebvre , Hao Li , Ethan Y. Cho , Nobuyuki Yoshikawa , Shane A. Cybart

Readout and control of qubits are limiting factors in scaling quantum computers. An ideal solution is to integrate energy-efficient cryogenic circuits close to the qubits to perform control and pre-processing tasks. With orders of magnitude…

Quantum Physics · Physics 2023-09-28 Sasan Razmkhah , Ali Bozbey , Pascal Febvre

Controllable adiabatic evolution of a multi-qubit system can be used for adiabatic quantum computation (AQC). This evolution ends at a configuration where the Hamiltonian of the system encodes the solution of the problem to be solved. As a…

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