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Quantum data processing

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2 Author(s)
Ahlswede, R. ; Fak. fur Math., Bielefeld Univ., Germany ; Lober, P.

We prove a data processing inequality for quantum communication channels, which states that processing a received quantum state may never increase the mutual information between input and output states

Published in:

Information Theory, IEEE Transactions on  (Volume:47 ,  Issue: 1 )