Speaker
Sho Araki
(The University of Osaka)
Description
Symmetric mass generation (SMG) is a mechanism for opening a gap without spontaneous symmetry breaking, first demonstrated by Fidkowski and Kitaev in a one-dimensional Majorana-chain model. We formulate the model as a Euclidean path integral on a two-dimensional lattice, with and without domain walls. Our numerical results show that four-fermion interactions can gap out the Majorana mode localized on one wall, while the mode on the opposite wall remains a free massless fermion. This suggests a possible approach to removing unwanted mirror fermions without breaking symmetry.