  Recent experiments suggest quantum interference effects in the Coulomb drag
of double-layer graphene systems. By accounting for correlated interlayer
impurity scattering under a weak magnetic field, our theoretical results reveal
drag resistivities resembling those in weak (anti-)localization. It is
established that the quantum interference effect is most significant when the
chemical potentials match. The theory clarifies the roles of intra- and
interlayer Berry phases in Coulomb drag in double-layer graphene systems and
helps delineate the intra- and intervalley contributions. These insights are
valuable for designing graphene-based electronic devices exploiting quantum
effects.
