Conditional information and hidden correlations in single-qudit states. (arXiv:1704.06082v1 [quant-ph])

We discuss the notions of mutual information and conditional information for
noncomposite systems, classical and quantum; both the mutual information and
the conditional information are associated with the presence of hidden
correlations in the state of a single qudit. We consider analogs of the
entanglement phenomena in the systems without subsystems related to strong
hidden quantum correlations.

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