Optimized sandwiched Rényi conditional entropy is additive under tensor products of arbitrary quantum channels, yielding new chain rules and time-adaptive quantum cryptographic security proofs.
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Additivity and chain rules for quantum entropies via multi-index Schatten norms
Optimized sandwiched Rényi conditional entropy is additive under tensor products of arbitrary quantum channels, yielding new chain rules and time-adaptive quantum cryptographic security proofs.