Microscopic Theory of Quantum Fluids and Nuclear Systems

量子流体和核系统的微观理论

• 批准号: 9307484
• 负责人: John Clark
• 金额: $ 33万
• 依托单位: Washington University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-07-15 至 1996-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9307484&HistoricalAwards=false
• 关键词: Microscopic; Theory; Quantum; Fluids; Nuclear

9307484 Clark Ongoing advances in computational physics will be exploited to characterize and predict the behavior of strongly coupled quantum many-particle systems under realistic conditions of density and interaction strengths. Two complementary microscopic approaches will be pursued: one is based on explicit descriptions of the correlation structure of the quantum system in space and spin degrees of freedom; the other focuses on the modification in intrinsic properties and interactions experienced by a particle emerged in a many-particle medium. These powerful computational methods give access to a wide range of systems and phenomena of fundamental interest, including the superfluids and superconductors that exist at superhigh temperatures inside pulsars; the superfluid phase transition in liquid helium near sero temperature; lattice-gauge models that offer insights into the nature of the vacuum and the mechanism of quark confinement; short-distance processes in nuclei and the link between nucleonic theories and quantum chromodynamics; and the rich panorama of excited states of nuclei and strongly coupled electronic systems. Projected research on these problems will provide theoretical support for existing or planned experimental efforts, including projects at CEBAF and observations of neutron stars by orbiting X-ray observatories. In a novel interdisciplinary initiative, neural network computational structures will be used for phenomenological analysis of nuclei and of materials of potential technological importance. ! ! A ( Times New Roman Symbol & Arial " h ; % ; % ı / terri l. hicks terri l. hicks

小行星9307484 计算物理学的不断进步将被用来描述和预测在密度和相互作用强度的现实条件下强耦合量子多粒子系统的行为。 两个互补的微观方法将被追求：一个是基于明确的描述的相关结构的量子系统在空间和自旋自由度;其他的重点是修改的内在属性和相互作用的粒子出现在一个多粒子介质。 这些强有力的计算方法使人们能够接触到广泛的系统和基本感兴趣的现象，包括超流体和超导体，在超高温下存在于超夸克内部;超流体相变在液氦接近血清温度;格规范模型，提供了深入了解真空的性质和夸克禁闭的机制;原子核中的短距离过程以及核子理论与量子色动力学之间的联系;以及原子核和强耦合电子系统的激发态的丰富全景。 对这些问题的研究计划将为现有或计划中的实验工作提供理论支持，包括CEBAF的项目和轨道X射线观测站对中子星的观测。 在一项新颖的跨学科计划中，神经网络计算结构将用于对原子核和具有潜在技术重要性的材料进行唯象分析。 ! ! 一 ( Times New Roman 符号Arial " H ; % ; % ı / 特里湖希克斯特里湖希克斯