Fig. 2: Schematic views of the two-dimensional tight-binding model under open boundary condition (OBC) along x direction. | Communications Physics

Fig. 2: Schematic views of the two-dimensional tight-binding model under open boundary condition (OBC) along x direction.

From: Gauge-dependent topology in non-reciprocal hopping systems with pseudo-Hermitian symmetry

Fig. 2

The gray and white circles represent the two sites A and B, and the yellow blocks indicate the selection of the primitive cell. The non-reciprocal hopping terms with parameters t0 ± γ0 are denoted by orange and green lines with arrows, while the reciprocal hopping terms with parameter t1/2 are denoted by gray lines. a Lattice model under OBC1. b Lattice model under OBC2.

Back to article page