Frontiers of Lattice Fermions

Symmetric mass generation of 8 Majorana domain-wall fermions

Jul 2, 2026, 3:40 PM

1h

Panasonic Auditorium, Yukawa Hall (YITP, Kyoto University)

poster

Speaker

Sho Araki (Osaka university)

Description

Symmetric mass generation (SMG) is a mechanism for opening a gap
without spontaneous breaking of symmetry,
which was first shown in the 1-dimensional Maojorana chain model by
Fidkowski and Kitaev(FK).
We consider the path-integral of the FK model on a 2-dimensional lattice
with and without domain-walls.
We numerically show that the $Z_8$ structure is properly encoded in
the Majorana fermion pfaffian and a preliminary evidence that we can gap out
one of the edge-localized modes on two domain-walls by 4-Fermi interactions.
This talk is based on arXiv:2512.11424 and a work in progress.