Schematic illustration of a serially coupled multi-QDP chain structure side-coupled with the MBSs by the MBS-QDP coupling λ_i (i = 1,2,…,N). The i-th QDP is composed of QD-i and QD-i′ with the energy levels ε_i and , respectively. The two MBSs are defined as η₁ and η₂, and the chemical potentials of the left and right leads are denoted by μ_L = E_F + eV/2 and μ_R = E_F − eV/2, respectively.