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（超级计算机）数值以及分析技术来研究同质和不均匀超导体的特性。 理论技术包括：量子蒙特卡洛模拟，重新归一化的群体理论，动力学系统理论，许多身体理论，路径积分方法以及任何其他理论方法，这些方法可能被认为是揭示目标物理学所必需的。 在低温和高温超导体中的实验发现直接激发了要动力的问题。 具体而言，超大超导网络阵列中量子零点波动，磁场，耗散和无序的影响。 另外，我们建议对预测出现在人工制造的约瑟夫森连接的随机阵列以及在新型的高温氧化物超导体中发现的磁性特性的物理来源进行直接比较。 从这里提出的工作中出现的物理学可能会影响理解量子的量子结构，这些结构有望导致一种新型的量子效应电子设备。