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Quantum error-correcting codes from matrix-product codes related to quasi-orthogonal and quasi-unitary matrices

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arxiv 2012.15691 v2 pith:TDHNPZNO submitted 2020-12-31 cs.IT math.ITquant-ph

Quantum error-correcting codes from matrix-product codes related to quasi-orthogonal and quasi-unitary matrices

classification cs.IT math.ITquant-ph
keywords codesmatrix-productfieldsfinitematricesquantumarticledual-containing
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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Matrix-product codes over finite fields are an important class of long linear codes by combining several commensurate shorter linear codes with a defining matrix over finite fields. The construction of matrix-product codes with certain self-orthogonality over finite fields is an effective way to obtain good $q$-ary quantum codes of large length. This article has two purposes: the first is to summarize some results of this topic obtained by the author of this article and his cooperators in [10-12]; the second is to add some new results on quasi-orthogonal matrices (resp. quasi-unitary matrices), Euclidean dual-containing (resp. Hermitian dual-containing) matrix-product codes and $q$-ary quantum codes derived from these matrix-product codes.

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    Quasi-orthogonal stabilizer codes relax orthogonality constraints to achieve higher logical rates and up to two orders of magnitude better error suppression under depolarizing noise.