Quantumness of channels

Abstract

The reliability of quantum channels for transmitting information is of profound importance from the perspective of quantum information. This naturally leads to the question as how well a quantum state is preserved when subjected to a quantum channel. We propose a measure of quantumness of channels based on non-commutativity of quantum states that is intuitive and easy to compute. We apply the proposed measure to some well known noise channels, both Markovian as well as non-Markovian and find that the results are in good agreement with those from a recently introduced $l_1$-norm coherence based measure.

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Cited by in corpus (2)

• Quantifying environment non-classicality in dissipative open quantum dynamics
• Quantum distinguishability measures: projectors vs. states maximization