This paper presents a brief overview of the current state-of-the-art of Josephson junctions for Quantum-based Voltage Standards fabricated with High-Temperature Superconductors (HTS). A short introduction on the history and technical evolution of Low Temperature Superconductors (LTS) technology is provided for non-specialists. Then HTS technology is summarized and discussed in the context of quantum voltage standard applications. Finally, the two most promising technologies: bicrystal and Focused Helium-Ion Beam junctions are discussed with more detail, analyzing strength, limitations and perspectives in both cases.

中文翻译：

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高温超导体量子电压标准的现状与未来

本文简要概述了用于使用高温超导体 (HTS) 制造的基于量子的电压标准的约瑟夫森结的最新技术。为非专业人士提供了关于低温超导体 (LTS) 技术的历史和技术演变的简短介绍。然后在量子电压标准应用的背景下对HTS技术进行总结和讨论。最后，更详细地讨论了两种最有前途的技术：双晶和聚焦氦离子束结，分析了两种情况下的强度、局限性和前景。