  Even though quantum pumping is a very promising field, it has unfortunately
not been unambiguously experimentally detected. The reason being that in the
experiments the rectification effect overshadows the pumped current. One of the
better known ways to detect it is by using the magnetic field symmetry
properties of the rectified and pumped currents. The rectified currents are
symmetric with respect to magnetic field reversal while the pumped currents do
not possess any definite symmetry with respect to field reversal. This feature
has been exploited in some recent works. In this work we look beyond this
magnetic field symmetry properties and provide examples wherein the nature or
magnitudes of the pumped and rectified currents are exactly opposite enabling
an effective distinction between the two.
