Mathematical Techniques for Quantum Communication Theory ∗

  title={Mathematical Techniques for Quantum Communication Theory ∗},
  author={Christopher A. Fuchs and Carlton M. Caves},
We present mathematical techniques for addressing two closely related questions in quantum communication theory. In particular, we give a statistically motivated derivation of the Bures-Uhlmann measure of distinguishability for density operators, and we present a simplified proof of the Holevo upper bound to the mutual information of quantum communication channels. Both derivations give rise to novel quantum measurements. 
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