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IEEJ Transactions on Fundamentals and Materials

Trend of Future Technologies based on Superconducting Electronics

Nobuyuki Yoshikawa

Published Dec 31, 2018• 0 citations
Publisher

Abstract

In this report, we represent current status of quantum computer researches using superconducting technologies and show the direction of the future research and development. A superconducting quantum computer system combining superconducting electronics and superconducting qubits based on superconducting integrated circuit technology is expected to become a more active area in the future as a potential technology for realizing a scalable large-scale quantum computers.

DOI
10.1541/ieejfms.139.20

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It is our great pleasure to have a Special Section entitled "Superconducting Electronics for Quantum Information Technologies" in IEICE Transactions on Electronics. The quantum information technology is strongly expected to develop in the fields of quantum computing, quantum communication, and quantum measurement. The superconducting electronics plays a number of important roles in these fields. In this Special Section, four invited papers, which describe superconducting quantum computers, digital electronics for controlling the quantum computers, and the quantum information processing by superconducting nanowire single-photon detectors and superconducting transition edge sensors, explained current states and future prospects in their fields. We hope the Special Section enhances the progress of related research fields and opens a new academic research area. Finally, I would like to appreciate this opportunity to the secretary and the guest associate editors for their dedicated activities to complete the Special Section.

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Superconducting quantum computers: who is leading the future?

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Abstract Superconducting quantum computing has emerged as a leading platform in the pursuit of practical quantum computers, driven by rapid advances from industry, academia, and government initiatives. This review examines the state of superconducting quantum technology, with emphasis on qubit design, processor architecture, scalability, and supporting quantum software. We compare the hardware strategies and performance milestones of key players—including IBM Quantum, Google Quantum AI, Rigetti Computing, Intel Quantum, QuTech, and Oxford Quantum Circuits—highlighting innovations in qubit coherence, control, and system integration. Landmark demonstrations such as quantum supremacy experiments are discussed alongside progress toward real-world applications in the noisy intermediate-scale quantum (NISQ) era. Beyond hardware, attention is given to the broader software and service ecosystem, including quantum programming frameworks, operating environments, and cloud-accessible platforms such as Amazon Braket, Azure Quantum, and OriginQ Cloud, which enable remote access and algorithm development. Persistent challenges in superconducting quantum computing—such as error correction, system stability, and large-scale integration—are assessed in light of emerging approaches aimed at fault-tolerant quantum computing. As the field moves from the NISQ era toward fault-tolerant quantum computing, we capture the defining hardware achievements and characteristics of current superconducting processors, while examining the ongoing efforts and challenges in overcoming NISQ-era limitations. These developments offer critical insights into the path toward scalable quantum systems and their transformative impact on future technologies, while also underscoring the strategic and societal considerations that require balancing innovation with responsible oversight and thoughtful governance.

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Abstract Superconducting quantum computing has emerged as a leading platform in the pursuit of practical quantum computers, driven by rapid advances from industry, academia, and government initiatives. This review examines the state of superconducting quantum technology, with emphasis on qubit design, processor architecture, scalability, and supporting quantum software. We compare the hardware strategies and performance milestones of key players—including IBM Quantum, Google Quantum AI, Rigetti Computing, Intel Quantum, QuTech, and Oxford Quantum Circuits—highlighting innovations in qubit coherence, control, and system integration. Landmark demonstrations such as quantum supremacy experiments are discussed alongside progress toward real-world applications in the noisy intermediate-scale quantum (NISQ) era. Beyond hardware, attention is given to the broader software and service ecosystem, including quantum programming frameworks, operating environments, and cloud-accessible platforms such as Amazon Braket, Azure Quantum, and OriginQ Cloud, which enable remote access and algorithm development. Persistent challenges in superconducting quantum computing—such as error correction, system stability, and large-scale integration—are assessed in light of emerging approaches aimed at fault-tolerant quantum computing. As the field moves from the NISQ era toward fault-tolerant quantum computing, we capture the defining hardware achievements and characteristics of current superconducting processors, while examining the ongoing efforts and challenges in overcoming NISQ-era limitations. These developments offer critical insights into the path toward scalable quantum systems and their transformative impact on future technologies, while also underscoring the strategic and societal considerations that require balancing innovation with responsible oversight and thoughtful governance.