Advances in Josephson Junction Materials and Processes Toward Practical Quantum Computing
ABSTRACT The Josephson junction (JJ) is the fundamental nonlinear building block of superconducting quantum technologies. Its macroscopic quantum tunneling physics underpins superconducting quantum computing, sensing, and communication, but scaling these platforms to utility‐scale architectures places increasingly stringent demands on junction materials, interfaces, and fabrication. Practical quantum computing requires high reproducibility, low power consumption, tunability, a small device footprint, and resilience to noise and defects. This review surveys how advances in materials science, device characterization, and nanofabrication are addressing these challenges and redefining the figures of merit for next‐generation JJs. This review also examines the evolution of fabrication strategies, from conventional multi‐angle evaporation to foundry‐compatible superconducting processes and the integration of emerging junction materials. Progress along these directions will determine how rapidly JJs move from laboratory‐scale components to the foundation of industrial‐scale quantum processors.
Authors
- Irfan A. Siddiqi (ORCID: https://orcid.org/0000-0003-2200-1090)
- Jie Luo (ORCID: https://orcid.org/0000-0002-6464-2761)
- Hyeon‐Jin Shin (ORCID: https://orcid.org/0000-0002-6992-6341)
- Gyunghyun Jang (ORCID: https://orcid.org/0009-0007-2864-1810)
- Hoon Hahn Yoon (ORCID: https://orcid.org/0000-0002-4081-3343)
- Long B. Nguyen (ORCID: https://orcid.org/0000-0001-8770-1763)
- Yosep Kim (ORCID: https://orcid.org/0000-0002-6332-1050)
- Akel Hashim (ORCID: https://orcid.org/0000-0002-8611-0125)
- Hyunseong Linus Kim (ORCID: https://orcid.org/0000-0003-4128-7119)
- Jaewon An (ORCID: https://orcid.org/0009-0008-0575-0747)
- Seungwon Jin (ORCID: https://orcid.org/0009-0001-5087-7180)
Institutions
- Lawrence Berkeley National Laboratory (US)
- Universität Hamburg (DE)
- Korea University (KR)
- Gwangju Institute of Science and Technology (KR)
- Max Planck Institute for the Structure and Dynamics of Matter (DE)
- University of California, Berkeley (US)
Publication Details
- Journal
- Advanced Science
- Published
- 2026-10-28
- DOI
- https://doi.org/10.1002/advs.78427
- Primary Topic
- Superconducting and THz Device Technology
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- U.S. Department of Energy
- National Research Foundation
- Gwangju Institute of Science and Technology
- Ministry of Trade, Industry and Energy
- Electronics and Telecommunications Research Institute
- National Research Foundation of Korea
- Ministry of Science and ICT, South Korea
- Office of Science