Non-Hermitian Skin Effect in a Non-Hermitian Electrical Circuit

Figure 2

Bulk properties of the of the nonreciprocal non-Hermitian circuit. (a) Bulk band structure as a function of for fixed and , which correspond to real circuit parameters ,,, and . Each curve in (a) represents an eigenfrequency at certain Bloch momentum in the first Brillouin zone (BZ). (b) The finite band structure as a function of of a finite circuit chain with 40 unit cells. The circuit parameters are the same as in (a). (c) The bulk band structure as a function of of the generalized Bloch circuit Hamiltonian. Each curve in (c) represents an eigenfrequency at certain non-Bloch wavevector in the first BZ. (d) Non-Bloch winding number calculated using the generalized Bloch circuit Hamiltonian in the generalized Brillouin zone with the same circuit parameters in Figure 2(a).