Quantum Coherence in Superconducting and Normal Systems

超导和普通系统中的量子相干性

• 批准号: 9407245
• 负责人: Vinay Ambegaokar
• 金额: --
• 依托单位: Cornell University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-07-15 至 1998-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9407245&HistoricalAwards=false
• 关键词: Quantum; Coherence; Superconducting; Normal; Systems

9407245 The work proposed here will involve the study of conductance anomalies in point contact, superconducting island and superconducting to insulating transition in metallic films. The work related to point contacts is very closely tied to the experiments at Cornell. The work on superconducting islands focusses on understanding the even vs. odd number of electrons in superconducting rodes and is motivated by the experimental observation that the properties of these systems depend upon whether the number of electrons is odd or even. The proposed work will develop a microscopic theory of superconducting to insulating transition analogous to the Anderson theory of localization. %%% The proposed research is to provide a fundamental understanding of some unusual properties of point contacts and superconducting rodes and is motivated by experiments in these systems. The work will also focus on developing a microscopic theory of superconducting to insulating transition, which is one of the important unsolved problems in theoretical condensed matter physics.

9407245这里的工作将涉及研究点接触时的电导异常、超导岛和金属薄膜中超导到绝缘的转变。与点接触相关的工作与康奈尔大学的实验密切相关。超导岛的工作主要集中在理解超导电极中的偶数和奇数电子，并受到实验观察的启发，这些系统的性质取决于电子的数量是奇数还是偶数。提出的工作将发展超导到绝缘过渡的微观理论，类似于安德森局域化理论。提出的研究是为了对点接触和超导电极的一些不寻常的特性提供一个基本的理解，并受到这些系统实验的激励。研究工作还将重点发展超导向绝缘转变的微观理论，这是理论凝聚态物理中尚未解决的重要问题之一。