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arxiv: quant-ph/9604022 · v1 · pith:SRGOAF2L · submitted 1996-04-22 · quant-ph

Quantum data processing and error correction

Benjamin Schumacher , M. A. Nielsen This is my paper

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keywords quantuminformationcorrectionerrornoisyprocessingquantityamount
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This paper investigates properties of noisy quantum information channels. We define a new quantity called {\em coherent information} which measures the amount of quantum information conveyed in the noisy channel. This quantity can never be increased by quantum information processing, and it yields a simple necessary and sufficient condition for the existence of perfect quantum error correction.

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