Fig. 1: Wave evolution in a temporal multilayer structure and two kinds of TIs. | Nature Communications

Fig. 1: Wave evolution in a temporal multilayer structure and two kinds of TIs.

From: Temporal multilayer structures in discrete physical systems towards arbitrary-dimensional non-Abelian Aharonov-Bohm interferences

Fig. 1

a Illustration of the concept of a temporal multilayer structure, where a wave evolves inside a discrete system experiencing two TIs at different times. Schematic operations of band-unfolding (and band-folding as the inverse operation) and band shifting. b, c Changes of the lattice structure by changing the ranges of couplings or coupling phase for realizing operations. d, e Changes of the states and band structures accordingly. Red (violet) lines are the bandstructures before (after) the TI. Green (yellow) dots denote the states before (after) the TI.

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