Fig. 2: The quotient relation of domain-wall states in the six-band non-Abelian topological insulator.
From: Photonic non-Abelian topological insulators with six bands
a The interface between the \({q}_{123456}\) and \({q}_{1256}\) samples. b Detailed couplings at the interface. c The Bloch bands of \({q}_{123456}\) and \({q}_{1256}\), respectively. d The energy spectrum of the configuration in (a). e The representative field patterns of left/right edge states (I/II) and domain-wall states (III), with the corresponding states highlighted in (d). f The interface between the \({q}_{123456}\) and \({q}_{1256}\) samples. g Intuitive understanding of the quotient relation. h The Bloch bands of \({q}_{123456}\) and \({q}_{16}\), respectively. i, The energy spectrum of the configuration in (f). j The representative field patterns of left/right edge states (I/II) and domain-wall states (III or IV), with the corresponding states highlighted in (i).
