  We propose a total measure of multi-particle quantum correlation in a system
of N two-level atoms (N qubits). We construct a parameter that encompasses all
possible quantum correlations among N two-level atoms in arbitrary symmetric
pure states and define its numerical value to be the total measure of the net
atom-atom correlations. We use that parameter to quantify the total quantum
correlations in atomic Schr\"{o}dinger cat states, which are generated by the
dispersive interaction in a cavity. We study the variation of the net amount of
quantum correlation as we vary the number of atoms from N=2 to N=100 and obtain
some interesting results. We also study the variation of the net correlation,
for fixed interaction time, as we increase the number of atoms in the excited
state of the initial system, and notice some interesting features. We also
observe the behaviour of the net quantum correlation as we continuously
increase the interaction time, for the general state of N two-level atoms in a
dispersive cavity.
