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Exponential Relative Entropy Decay Along Quantum Markov Semigroups

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arxiv 2505.07549 v2 pith:SYHSPTM7 submitted 2025-05-12 math.OA math-phmath.MPquant-ph

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keywords markovquantumalgebrasalongdecayentropyexponentialinequality
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We establish the equivalence between exponential decay of the relative entropy along a quantum Markov semigroup and the modified logarithmic Sobolev inequality for general von Neumann algebras. We also extend an intertwining criterion for the modified logarithmic Sobolev inequality to GNS-symmetric quantum Markov semigroups on infinite-dimensional von Neumann algebras.

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  1. Transportation cost and contraction coefficient for channels on von Neumann algebras

    math.OA 2025-06 conditional novelty 8.0 of 10

    A new framework defines channel cost and contraction via Lipschitz seminorms, proving duality, tensor properties, and applications to word length, Carnot-Carathéodory distance, and mixing times.

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