  The projective measurement usually destroys the quantum correlation between
two subsystems of a composite system, thereby making the measured state useless
for any efficient quantum information processing and quantum computation task.
The weak measurement acts gently on quantum system and do not force the system
state to decohere completely, thus revealing the super quantum discord, which
can take value more than that of the normal quantum discord. Remarkably, we
prove that the super quantum discord in the post measured state is equal to the
difference between the super quantum discord and the normal quantum discord in
the original state. Thus, the weak measurement has the ability to resurrect the
lost quantumness of any composite quantum state. This suggests a conservation
law for the extra quantum correlation in any composite state. The amount of
extra quantum correlation which is destroyed by the projective measurement in
the original state is equal to the amount of extra quantum correlation captured
by the weak measurement in the post-measured state.
