Superconducting qubits at scale

IF 33.7 1区 工程技术 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Katharina Zeissler
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引用次数: 0

Abstract

The researchers — who are based at Imec and KU Leuven — fabricated transmon-style qubits with aluminium/aluminium oxide/aluminium overlap Josephson junctions using only optical lithography and reactive-ion etching. They characterized 400 qubits and 12,840 Josephson junctions across the entire wafer, reporting a yield of 98.25% and a time-averaged median relaxation time of 75 μs. The ageing of the Josephson junctions after storage in a cleanroom at room temperature also showed little variation in the qubit frequency after 151 days, which was attributed to the absence of any organic photoresist (and thus carbon impurities) during the fabrication.

Original reference: Nature 634, 74–79 (2024)

超导量子比特
Imec和鲁汶工程大学的研究人员仅用光学光刻和活性离子蚀刻技术就制造出了带有铝/氧化铝/铝重叠约瑟夫森结的跨子型量子比特。他们对整个晶片上的 400 个量子比特和 12,840 个约瑟夫森结进行了鉴定,结果表明产量为 98.25%,时间平均弛豫时间中值为 75 μs。约瑟夫森结在室温下的洁净室中存放 151 天后的老化情况也表明,量子比特频率几乎没有变化,这归因于在制造过程中没有任何有机光刻胶(因此也没有碳杂质):自然》634 期 74-79 页(2024 年)
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来源期刊
Nature Electronics
Nature Electronics Engineering-Electrical and Electronic Engineering
CiteScore
47.50
自引率
2.30%
发文量
159
期刊介绍: Nature Electronics is a comprehensive journal that publishes both fundamental and applied research in the field of electronics. It encompasses a wide range of topics, including the study of new phenomena and devices, the design and construction of electronic circuits, and the practical applications of electronics. In addition, the journal explores the commercial and industrial aspects of electronics research. The primary focus of Nature Electronics is on the development of technology and its potential impact on society. The journal incorporates the contributions of scientists, engineers, and industry professionals, offering a platform for their research findings. Moreover, Nature Electronics provides insightful commentary, thorough reviews, and analysis of the key issues that shape the field, as well as the technologies that are reshaping society. Like all journals within the prestigious Nature brand, Nature Electronics upholds the highest standards of quality. It maintains a dedicated team of professional editors and follows a fair and rigorous peer-review process. The journal also ensures impeccable copy-editing and production, enabling swift publication. Additionally, Nature Electronics prides itself on its editorial independence, ensuring unbiased and impartial reporting. In summary, Nature Electronics is a leading journal that publishes cutting-edge research in electronics. With its multidisciplinary approach and commitment to excellence, the journal serves as a valuable resource for scientists, engineers, and industry professionals seeking to stay at the forefront of advancements in the field.
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