Extended Data Fig. 1: Dirac cone as a signature of non-Abelian lattice gauge fields.
From: Non-Abelian lattice gauge fields in photonic synthetic frequency dimensions
Theoretical band structure of Hamiltonian equation (2) in the vicinity of Γ: (kx, ky) = (0, 0), for (a) non-Abelian gauge potentials Ax = (π/2)σz and Ay = (π/2)σx, and (b) Abelian gauge potentials Ax = Ay = (π/2)σz.
