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25 October 2021
 
  » arxiv » 2007.13309

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Hermitian dual-containing constacyclic BCH codes and related quantum codes of length $frac{q^{2m}-1}{q+1}$
X. Zhao ; X. Li ; Q. Wang ; T. Yan ;
Date 27 Jul 2020
AbstractIn this paper, we study a family of constacyclic BCH codes over $mathbb{F}_{q^2}$ of length $n=frac{q^{2m}-1}{q+1}$, where $q$ is a prime power, and $mgeq2$ an even integer. The maximum design distance of narrow-sense Hermitian dual-containing constacyclic BCH codes of length $n$ is determined. Furthermore, the exact dimension of the constacyclic BCH codes with given design distance is computed. As a consequence, we are able to derive the parameters of quantum codes as a function of their design parameters of the associated constacyclic BCH codes. This improves the result by Yuan et al. (Des Codes Cryptogr 85(1): 179-190, 2017), showing that with the same lengths, except for three trivial cases ($q=2,3,4$), our resultant quantum codes can always yield strict dimension or minimum distance gains than the ones obtained by Yuan et al.. Moreover, fixing length $n=frac{q^{2m}-1}{q+1}$, some constructed quantum codes have better parameters or are beneficial complements compared with some known results (Aly et al., IEEE Trans Inf Theory 53(3): 1183-1188, 2007, Li et al., Quantum Inf Process 18(5): 127, 2019, Wang et al., Quantum Inf Process 18(8): 323, 2019, Song et al., Quantum Inf Process 17(10): 1-24, 2018.).
Source arXiv, 2007.13309
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