PASI: Workshop on Mottness and Quantum Criticality; Trinidad, June 2005

由美国国家科学基金会和美国能源部联合支持的泛美高级研究所（PASI）将于2005年6月在西印度群岛的多巴哥举行关于“混沌和量子临界性”的主题会议。本课题涉及的问题是铜氧化物材料和有机超导体中超导性起源的核心问题，以及U和Ce金属间化合物（重费米子）中的非费米液体行为。这个为期两周的研究所将汇集该领域的主要研究人员，重点研究这两个问题。PASI将由大约20名讲师和30名研究生组成，其中一半来自美国，一半来自美洲其他地区，由组织委员会选出。五个问题将构成PASI的重点：1)量子临界点影响铜酸盐有限温度特性的实验证据是什么？(2)在铜酸盐的正常态和超导态中，Mott尺度上的谱权转移起什么作用？， 3)接近量子临界点的失序起什么作用？4)强相关系统的模型研究有预测能力吗？5)从有机超导体、重费米子和低维系统中的新型金属相等平行系统中可以学到什么？为了进一步扩大PASI的影响，组织者1)同时邀请了实验学家和理论家，2)将会议的范围限制在上面提出的非常具体的问题上。研讨会将有充足的时间用于讨论，部分原因是为了使合作能够阐明所提出的问题。由于这些问题是当前关于强相关电子的争论的核心，因此PASI是及时的，并且可能会在主题问题上产生进一步的活动。

0418330PhillipsA Pan-American Advanced Studies Institute (PASI), jointly supported by the NSF and Department of Energy is proposed on the topic of Mottness and Quantum Criticality, to be held in Tobago, West Indies during June, 2005. The topic involves problems that are central to the unsolved problems of the origin of superconductivity in the copper-oxide materials and organic superconductors, and non-Fermi liquid behavior in U and Ce intermetallics (heavy fermions). This two-week institute will bring together leading researchers in the field to focus on both of these problems. The PASI will consist of approximately 20 lecturers and 30 graduate students, half from the US and half from the rest of the Americas, to be selected by an organizing committee. Five questions will comprise the focus of the PASI: 1) What is the experimental evidence that quantum critical points influence finite temperature properties of the cuprates?, 2) What role does spectral weight transfer over the Mott scale play in the normal and superconducting states of the cuprates?, 3) What is the role played by disorder close to quantum critical points?, 4) Do model studies of strongly correlated systems have any predictive power? 5) What can be learned from parallel systems such as the organic superconductors, heavy fermions and novel metal phases in low dimensional systems? To further the impact of the PASI, the organizers have 1) included both experimentalists and theorists and 2) limited the scope of the conference to focus on the very specific questions posed above. Ample time in the workshop will be devotedto discussions, in part to enable collaborations that could elucidate the posed questions. As these questions are central to the current debate on strongly correlated electrons, the PASI is timely and is likely to generate further activity in the subject matter.