AI RESEARCH
Quantum Doeblin Coefficients: Interpretations and Applications
arXiv CS.LG
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ArXi:2503.22823v3 Announce Type: replace-cross In classical information theory, the Doeblin coefficient of a classical channel provides an efficiently computable upper bound on the total-variation contraction coefficient of the channel, leading to what is known as a strong data-processing inequality. Here, we investigate quantum Doeblin coefficients as a generalization of the classical concept.