BEGIN:VCALENDAR VERSION:2.0 PRODID:-//CERN//INDICO//EN BEGIN:VEVENT SUMMARY:Quantum Hall Effect: Composite Fermions and Phase Transitions DTSTART;VALUE=DATE-TIME:20231017T053000Z DTEND;VALUE=DATE-TIME:20231017T073000Z DTSTAMP;VALUE=DATE-TIME:20250827T090700Z UID:indico-event-20758@indico.ihep.ac.cn DESCRIPTION:Speakers: 吴英海 (华中科技大学)\n报告摘要：Quant um Hall states are prototypical examples of topological phases. They were initially discovered in two-dimensional electron gases and have generated widespread interest in many other areas. The advances in cold atoms create novel settings for studying topological states. The constituents of quant um gases can be different types of bosons\, fermions\, and their mixtures. We propose a class of symmetry-protected topological states in two-dimens ional Bose-Fermi mixtures using the composite fermion theory. These states have no fractionalized excitations but possess gapless edge states. In ce rtain continuum and lattice models\, we can induce continuous quantum phas e transitions between these states and some fractional quantum Hall states by tuning the inter-species interaction. The critical theory of these tra nsitions are Chern-Simons-Higgs field theory in which the condensation of a scalar boson field leads to “locking” of a pair of emergent gauge fi elds.\n\n报告人简介：Ying-Hai Wu obtained his bachelor degree from D epartment of Modern Physics of University of Science and Technology of Cha in in 2009\, he then studied at the Pennsylvania State University under th e supervision of Prof. Jainendra Jain and obtained his Ph.D. degree in 201 4. He was a postdoc research in the theory group of Max Planck Institute o f Quantum Optics during 2014 and 2017. He has been an associate professor in School of Physics of Huazhong University of Science and Technology. His main research areas are strongly correlated topological states and quantu m impurity systems. He has published about 30 papers in peer-reviewed jour nals.\n \nhttps://indico.ihep.ac.cn/event/20758/ URL:https://indico.ihep.ac.cn/event/20758/ END:VEVENT END:VCALENDAR