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25 April 2024

» arxiv » quant-ph/9603014

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A General Fidelity Limit for Quantum Channels
Howard Barnum ; Christopher A. Fuchs ; Richard Jozsa ; Benjamin Schumacher ;
Date:	8 Mar 1996
Subject:	quant-ph
Abstract:	We derive a general limit on the fidelity of a quantum channel conveying an ensemble of pure states. Unlike previous results, this limit applies to arbitrary coding and decoding schemes, including nonunitary decoding. This establishes the converse of the quantum noiseless coding theorem for all such schemes.
Source:	arXiv, quant-ph/9603014
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