发表机构
Institute for Theoretical Physics, Jagiellonian University（雅盖隆大学理论物理研究所）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文以三维约瑟夫森结阵列模型解释高温超导体的磁调制微波吸收（MMMA）特征，探讨其对约瑟夫森结量子比特微波吸收研究的意义。
AI 中文摘要
自Stankowski等人针对YBa$_2$Cu$_3$O$_{7-x}$开展的开创性实验[Phys. Rev. B 36, 7126 (1987)]以来，磁调制微波吸收（MMMA）已成为检测非均匀陶瓷化合物中超导转变的重要技术。$T_c$以下微波吸收的增强伴随多个低场异常，通常归因于表现出约瑟夫森效应的超导晶粒间的弱连接，或阿布里科索夫-约瑟夫森涡旋的动力学。本文简要综述了用于解释高温超导体MMMA谱的部分理论模型，重点关注具有随机参数（包括每个结的电阻率、电容和电感）的三维约瑟夫森结阵列，其展现出实验中观测到的特征吸收异常。还讨论了该模型对近期研究的约瑟夫森结量子比特中微波吸收的意义。
英文摘要
Since the seminal experiment by Stankowski et al. [Phys. Rev. B 36, 7126 (1987)] on YBa$_2$Cu$_3$O$_{7-x}$, Magnetically-Modulated Microwave Absorption (MMMA) has become an important technique for detecting the superconducting transition in inhomogeneous ceramic compounds. The rise of microwave absorption below $T_c$ is accompanied by several low-field anomalies, usually attributed to the weak links between superconducting grains showing the Josephson effect, or to the dynamics of Abrikosov-Josephson vortices. In this article, we briefly review selected theoretical models rationalizing MMMA spectra for high-temperature superconductors, focusing on the $3$-dimensional array of Josephson junctions with random parameters including the resistivity, capacity and inductance of each junction, showing characteristic absorption anomalies observed in the experiment. The implications for recently studied microwave absorption in Josephson junction qubits are also discussed.
CommentsMinor revisions, references added. RevTeX, 10 pages, 6 figures. Submitted to the special issue of Acta Phys. Pol. A, in commemoration of the 40th anniversary of the discovery of high-temperature superconductivity
