(a) The diagrams for the semiclassical conductivity σ^sc. v and are the bare velocity and the velocity after the vertex correction, respectively. (b) The Hikami boxes of the maximally-crossed diagrams, from which the conductivity correction from the quantum interference σ^qi is calculated.^[18] (c) The iteration equations for the Diffuson (Λ), Cooperon (Γ), and dynamically screened interaction. (d) The Fock and Hartree self-energies dressed by Diffuson and Cooperon, from which the conductivity correction from the electron–electron interaction σ^ee is calculated. k and q stand for the wave vectors, and ε_n and ω_m for the Matsubara frequencies. Adapted from Ref. [19].