Figure 2.

Bulk properties of the of the nonreciprocal non-Hermitian circuit. (a) Bulk band structure as a function of t₁ for fixed t₂ = 2.85 and γ₁ = γ₂ = 1.45, which correspond to real circuit parameters C₀ = 470 pF, C₂ = 1000 pF, C₃ = C₄ = 680 pF, and L₀ = 47 μH. Each curve in (a) represents an eigenfrequency at certain Bloch momentum q in the first Brillouin zone (BZ). (b) The finite band structure as a function of t₁ 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 t₁ of the generalized Bloch circuit Hamiltonian. Each curve in (c) represents an eigenfrequency at certain non-Bloch wavevector β 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).