  Coherence and correlation are key features of the quantum system. Quantifying
these quantities are astounding task in the framework of resource theory of
quantum information processing. In this article, we identify an affinity-based
metric to quantify closeness between two states. Using this metric, we
introduce a valid quantum coherence measure. It is shown that the affinity
based coherence measure is bounded by that based on fidelity and trace
distance. Further, we propose a bipartite quantum correlation measure based on
the affinity metric. The connection between the quantum correlation of states
and its local coherence is established. The measure of quantumness in terms of
difference of bipartite coherence and corresponding product state coherence is
also identified. Finally, we interpret the operational meaning of the affinity
based coherence as an upper bound of interferometric power of the quantum
state.
