Title

QUANTUM DATA PROCESSING AND ERROR CORRECTION

Document Type

Article

Publication Date

January 1996

Abstract

This paper investigates properties of noisy quantum information channels. We define a quantity called 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.

Journal

Physical Review A

Volume

54

Issue

4

First Page

2629

Last Page

2635

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