CMSA Quantum Matter in Mathematics and Physics: A solution to the chiral fermion problem


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February 18, 2021 10:30 am - 12:00 pm
via Zoom Video Conferencing

Xiao-Gang Wen - MIT

Motivated by the relation between anomaly and topological/SPT order in one higher dimension, we propose a solution to the chiral fermion problem. In particular, we find several sufficient conditions, such that a chiral fermion field theory can be regularized by an
interacting lattice model in the same dimension. We also discuss some related issues, such as mass without mass term, and why 'topological' phase transitions are usually not "topological" phase transitions.