Universal Bounds for the Holevo Quantity, Coherent Information, and the Jensen-Shannon Divergence
Universal Bounds for the Holevo Quantity, Coherent Information, and the Jensen-Shannon Divergence
The Holevo quantity provides an upper bound for the mutual information between the sender of a classical message encoded in quantum carriers and the receiver. Applying the strong sub-additivity of entropy we prove that the Holevo quantity associated with an initial state and a given quantum operation represented in its …