  The relationship between the universal conductance fluctuation and the weak
localization effect in monolayer graphene is investigated. By comparing
experimental results with the predictions of the weak localization theory for
graphene, we find that the ratio of the elastic intervalley scattering time to
the inelastic dephasing time varies in accordance with the conductance
fluctuation; this is a clear evidence connecting the universal conductance
fluctuation with the weak localization effect. We also find a series of
scattering lengths that are related to the phase shifts caused by magnetic flux
by Fourier analysis.
