Strongly interacting cold atoms in optical lattices

光学晶格中强相互作用的冷原子

• 批准号: 288179-2008
• 负责人: Zhou, Fei
• 金额: $ 2.41万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2009
• 资助国家: 加拿大
• 起止时间: 2009-01-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=427231
• 关键词: Strongly; interacting; cold; atoms; optical

Since the observation of Bose-Einstein condensation of ultra cold atoms, there have been tremendous experimental and theoretical efforts to understand how each individual atom cooperates with others at nanokelvin temperatures and how fascinating correlations between cold atoms manifest themselves in various experiments. Milestone experiments in this field include the observation of superfluid-Mott insulating state transitions of rubidium atoms in optical lattices, the observation of Tonk-Girardeau gases, the observation of molecules and superfluids near Feshbach resonances of lithium or potassium atoms. It is widely accepted that many most sophisticated physical systems such as quantum condensed matter systems can be effectively simulated using cold atoms and one of the forefronts of cold atom research is to use ultra cold matter to investigate various outstanding issues of many-body physics. Optical lattices provide fascinating and unique opportunities to study superfluids, quantum magnetism and coherent quantum dynamics, and will lead to various breakthroughs in our understanding of fundamentals of interacting ultra cold atoms. These studies will shed light not only on how cold atoms behave at nanokelvin temperatures, but also on our understanding of issues such as high temperature superconductivity, quantum computation; the impact can go far beyond atomic, molecular and optics physics. This proposal focuses on correlations between ultra cold atoms in extreme quantum limits; especially, a) superfluids near Feshbach resonances and lattice Feshbach resonances; b) hyperfine spin correlated matter of ultra cold atoms, or more generally quantum magnetism in optical lattices; c) creation and detection of fractionalized topological excitations and detection of spin correlations of cold atoms; d) beyond-mean-field coherent dynamics especially coherent spin dynamics.

自从观察到超冷原子的Bose-Einstein凝结以来，已经进行了巨大的实验和理论努力，以理解每个人如何在纳米诺氏菌温度下与他人合作，以及在各种实验中冷原子之间的迷人相关性如何表现出来。该领域的里程碑实验包括观察光学晶格中rubidium原子的超氟米特绝缘状态过渡，观察tonk-girardeau气体的观察，分子的观察和在锂或波顿原子的菲什巴赫共振附近的分子和超氟。人们普遍认为，可以使用冷原子有效地模拟许多最复杂的物理系统，例如量子冷凝系统，而冷原子研究的最前沿之一就是使用超冷物质来研究多体物理学的各种出色问题。光学晶格为研究超流体，量子磁性和相干量子动力学提供了有趣而独特的机会，并将在我们对相互作用的超冷原子的基本原理的理解中带来各种突破。这些研究不仅会阐明冷原子在纳米甲基温度下的表现，而且还阐明了我们对高温超导性，量子计算等问题的理解；影响远远超出了原子，分子和光学物理。该提案的重点是极端量子限制的超冷原子之间的相关性。尤其是a）在Feshbach共振和晶格Feshbach共鸣附近的超流体； b）超冷的超冷原子的高素质相关物质，或在光学晶格中更普遍的量子磁性； c）产生和检测分离拓扑激发和检测冷原子的自旋相关性； d）超出均值的连贯动力学，尤其是连贯的旋转动力学。