报告题目: |
Monopoles in algebraic spin liquids: towards a unified view on 2Dquantum magnetism |
报告人: |
Chong Wang 王翀 |
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Perimeter Institute for Theoretical Physics
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报告时间: |
2018-09-18 16:00 |
报告地点: |
Conference Hall 322, Science Building, Tsinghua University |
主办单位: |
高等研究院 |
简介: |
Quantum magnets provide the simplest example of strongly interacting quantum matter, yet they continue to resist a comprehensive understanding above one spatial dimension. In this talk I will discuss a single effective theory, Quantum Electrodynamics (QED3), that describes multiple orders on different two dimensional lattices in a unified framework. This theory includes photons, four flavors of Dirac fermions, as well as monopoles, an important class of excitations that drive confinement. By resolving the long standing open issue of monopoles and their symmetry properties, we naturally account for various orders on both bipartite lattices such as the square and honeycomb as well as non-bipartite triangular and Kagome lattices. Our theory points to two different scenarios for these two types of lattices. In particular, in spin models on non-bipartite lattices, the QED3 theory may be stabilized, giving rise to a stable algebraic spin liquid phase. |
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