报告摘要：Orbital is a fascinating degree of freedom independent of charge and spin. In condensed matter physics, it is traditionally known---through its coupling to the latter two---for playing an important role in superconductivity, magnetism and other quantum phenomena. The advanced spatiotemporal control of cold atoms provides new opportunities to explore orbital physics in physical conditions beyond what natural materials usually offer, complementary to studies in condensed matter. Higher orbital bands, dynamically realized with optical lattices, are found able to not only simulate outstanding well-known problems but also bring conceptually different phenomena that seem to have no prior analogue. In this talk, I will report on theoretical and experimental progress in orbital optical lattices, and highlight unique phases of matter emerging from the interplay of novel spatial lattice geometry and emerging orbital symmetries in such artificial quantum systems. Great examples include chiral atomic Bose-Einstein condensate with topological excitations and p+ip-wave fermionic pairing across odd-even parity orbital bands.
报告人简介：刘文胜，1999年博士毕业于美国德克萨斯大学奥斯汀分校，师从诺贝尔物理学奖得主Steven Weinberg教授。博士毕业后，先后在伊利诺伊大学厄巴纳香槟分校和麻省理工学院从事博士后工作。2004年加入美国匹兹堡大学担任教授，2017-2020在上海交通大学兼任“春申”讲座教授，是该校Wilczek 量子中心的创始主任。目前是南方科技大学物理系教授。他的研究范围从冷原子和凝聚态物理到场论和高能物质的应用。2007年获得全球华人物理和天文学会杰出青年科学家奖，2017年当选美国物理学会会士。