A Family of Degenerate Codes for Depolarizing Channels
A Family of Degenerate Codes for Depolarizing Channels
摘要
Quantum degenerate code may improve the hashing bound of quantum capacity. We propose a family of quantum degenerate codes derived from two-colorable graphs. The coherent information of the codes is analyticaJly obtained as a function of the channd noise for the depolarizing channel. We find a new code which has a higher noise threshold than that of the repetition code.
基金
Supported by the National Natural Science Foundation of China under Grant Nos.60972071 and 11375152
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