New Frontiers in QCD 2026

Symmetric Mass Generation of Eight Majorana Domain-Wall Fermions

Nov 12, 2026, 2:40 PM

25m

Panasonic Auditorium, Yukawa Hall (YITP, Kyoto University)

(5th week, Nov. 9-13) Theoretical Developments in QCD and related topics Week 5: Theoretical Developments in QCD and related topics

Speaker

Sho Araki (Osaka university)

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.