Title

General fidelity limit for quantum channels

Document Type

Article

Publication Date

January 1996

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. This establishes in full generality the quantum noiseless coding theorem, formerly obtained only for the special case of unitary decoding schemes.

Journal

Physical Review A

Volume

54

Issue

6

First Page

4707

Last Page

4711

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