Theoretical Studies of Quantum and Metastable Effects in Superconductors

超导体中量子和亚稳态效应的理论研究

• 批准号: 8817933
• 负责人: Jorge Jose
• 金额: --
• 依托单位: Northeastern University
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1988
• 资助国家: 美国
• 起止时间: 1988-11-15 至 1992-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8817933&HistoricalAwards=false
• 关键词: Theoretical; Studies; Quantum; Metastable; Effects

This research will rely heavily on the use of (supercomputer) numerical as well as analytic techniques to study the properties of homogeneous and inhomogeneous superconductors. The theoretical techniques include: Quantum Monte Carlo simulations, renormalization group theory, dynamical systems theory, many body theory, path integral methods and any other theoretical approach that may be deemed necessary to unravel the physics of interest. The problems to be considered motivate and are motivated directly by experimental findings in low and high temperature superconductors. Specifically, the effects of quantum zero point fluctuations, magnetic fields, dissipation and disorder in arrays of ultrasmall superconductor networks. Also, we propose to carry out a direct comparison of the physical sources of metastability in the magnetic properties predicted to appear in artificially fabricated random arrays of Josephson junctions and those found in the novel high temperature oxide superconductors. The physics that will emerge from the work proposed here could have an impact in the understanding of the submicron structures that promise to lead to a new type of quantum effect electronic devices.

这项研究将在很大程度上依赖于使用（超级计算机）数值和分析技术来研究均匀和非均匀超导体的性质。理论技术包括：量子蒙特卡罗模拟，重整化群论，动力系统理论，多体理论，路径积分方法和任何其他理论方法，可能被认为是必要的解开感兴趣的物理。在低温超导体和高温超导体的实验结果直接激发和激发了要考虑的问题。具体来说，量子零点涨落、磁场、耗散和无序对超小型超导网络阵列的影响。此外，我们建议直接比较人工制造的约瑟夫森结随机阵列和新型高温氧化物超导体中预测出现的磁特性亚稳态的物理来源。从这里提出的工作中产生的物理学可能会对亚微米结构的理解产生影响，这些结构有望导致新型量子效应电子设备。