Fig. 5: Experimental results of the boundary site geometry-dependent non-Hermitian topological synchronization.

a The schematic diagram for realizing a lattice model with the contour profile in the form of a triangle in the electric circuit to simulate boundary site geometry-dependent synchronization. The dashed red, blue, and black circles enclose the left, right, and bottom boundaries of the circuit lattice model, respectively. b1, b2. Measured voltage signal marked by the purple pentagram at the bottom boundary and the corresponding frequency spectrum. c1, c2. Measured voltage signal marked by the green pentagram at the left boundary and the corresponding frequency spectrum. d1–d2, e1–e2. Measured voltage signals and corresponding frequency spectra of circuit nodes marked by the blue and black pentagrams at the right boundary.