2 papers
quant-ph2000
Strong Converse for Identification via Quantum Channels
R. Ahlswede, A. Winter
In this paper we present a simple proof of the strong converse for identification via discrete memoryless quantum channels, based on a novel covering lemma. The new method is a gen…
quant-ph1999
Quantum Data Processing
Rudolf Ahlswede, Peter Loeber
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 in…