  We prove that, when two local quantum channels are used paralleled, the
quantum-correlating power (QCP) of the composed channel is no less than the sum
of QCP of the two channels. For local channels with zero QCP, the
super-activation of QCP is a fairly common effect, and proved to exist except
for the trivial case where both of the channels are completely decohering
channels or unitary operators. For general quantum channels, we show that the
(not-so-common) additivity of QCP can be observed for the situation where a
measuring-and-preparing channel is used together with a completely decohering
channel.
