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Fidelity based purity and coherence for quantum states (2104.03844v1)
Published 8 Apr 2021 in quant-ph
Abstract: Purity and coherence of a quantum state are recognized as useful resources for various information processing tasks. In this article, we propose a fidelity based valid measure of purity and coherence monotone and establish a relationship between them. This formulation of coherence is extended to quantum correlation relative to measurement. We have also studied the role of weak measurement on purity.
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