Quantum coherence measure based on affinity

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