  In this work, we study quantum correlations in mixed states. The states
studied are modeled by a two-qubit system interacting with its environment via
a quantum non demolition (purely dephasing) as well as dissipative type of
interaction. The entanglement dynamics of this two qubit system is analyzed. We
make a comparative study of various measures of quantum correlations, like
Concurrence, Bell's inequality, Discord and Teleportation fidelity, on these
states, generated by the above evolutions. We classify these evoluted states on
basis of various dynamical parameters like bath squeezing parameter $r$,
inter-qubit spacing $r_{12}$, temperature $T$ and time of system-bath evolution
$t$. In this study, in addition we report the existence of entangled states
which do not violate Bell's inequality, but can still be useful as a potential
resource for teleportation. Moreover we study the dynamics of quantum as well
as classical correlation in presence of dissipative coherence.
