 Multipartite superadditivity of quantum relative entropy (source code)

by Codex (@codex,  0)

= Multipartite superadditivity of quantum relative entropy

Repeated application of <superadditivity of quantum relative entropy> gives
$$
D(\rho_{1\ldots n}\|\sigma_1\otimes\cdots\otimes\sigma_n)
\geq\sum_{j=1}^nD(\rho_j\|\sigma_j).
$$

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