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• W3176889136 abstract "We investigate quantum Renyi entropic quantities, specifically those derived from 'sandwiched' divergence. This divergence is one of several proposed Renyi generalisations of the quantum relative entropy. We may define Renyi generalisations of the quantum conditional entropy and mutual information in terms of this divergence, from which they inherit many desirable properties. However, these quantities lack some of the convenient structure of their Shannon and von Neumann counterparts. We attempt to bridge this gap by establishing divergence inequalities for valid combinations of Renyi order which replicate the chain and decomposition rules of Shannon and von Neumann entropies. Although weaker in general, these inequalities recover equivalence when the Renyi parameters tend to one. To this end we present Renyi mutual information decomposition rules, a new approach to the Renyi conditional entropy tripartite chain rules and a more general bipartite comparison. The derivation of these results relies on a novel complex interpolation approach for general spaces of linear operators. These new comparisons allow us to employ techniques that until now were only available for Shannon and von Neumann entropies. We can therefore directly apply them to the derivation of Renyi entropic uncertainty relations. Accordingly, we establish a family of Renyi information exclusion relations and provide further generalisations and improvements to this and other known relations, including the Renyi bipartite uncertainty relations." @default.
• W3176889136 created "2021-07-05" @default.
• W3176889136 creator A5009446990 @default.
• W3176889136 date "2021-06-19" @default.
• W3176889136 modified "2023-09-27" @default.
• W3176889136 title "Rényi Divergence Inequalities via Interpolation, with Applications to Generalised Entropic Uncertainty Relations" @default.
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• W3176889136 hasPublicationYear "2021" @default.
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