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Generalized Perfect Codes for Symmetric Classical-Quantum Channels

arXiv
Authors: Andreu Blasco Coll, Gonzalo Vazquez-Vilar, Javier R. Fonollosa

Year

2020

Paper ID

22194

Status

Preprint

Abstract Read

~2 min

Abstract Words

98

Citations

N/A

Abstract

We define a new family of codes for symmetric classical-quantum channels and establish their optimality. To this end, we extend the classical notion of generalized perfect and quasi-perfect codes to channels defined over some finite dimensional complex Hilbert output space. The resulting optimality conditions depend on the channel considered and on an auxiliary state defined on the output space of the channel. For certain N-qubit classical-quantum channels, we show that codes based on a generalization of Bell states are quasi-perfect and, therefore, they feature the smallest error probability among all codes of the same blocklength and cardinality.

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  • This paper contributes to the Quantum Foundations research area in the Quantum Articles archive.
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  • We define a new family of codes for symmetric classical-quantum channels and establish their optimality.

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