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arXiv 2602.23307quant-ph
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张量积群代数码中的拷贝杯门

Copy-cup Gates in Tensor Products of Group Algebra Codes

University of Bristol(布里斯托大学)

Ryan Tiew, Nikolas P. Breuckmann

AI总结:

本研究通过张量积群代数码构造具有恒定深度CZ和CCZ门的量子码,确定了2-和3-拷贝杯门的条件及码距离特性。

摘要:

我们确定了经典群代数码的条件,使得它们具有预定向用于杯积和拷贝杯门。这定义了通过经典群代数码的张量积构造的具有恒定深度CZ和CCZ门的量子码,包括超图和平衡积。我们显示确定这些条件依赖于解决图论中的完美匹配问题。对于2-和3-拷贝杯门,群代数码的条件在重量不超过4的情况下完全确定,包括具有奇数检查重量的码。这些包括双变量自行车码,我们显示它们既不具有预定向用于两种类型的拷贝杯门。我们显示满足非结合性3-拷贝杯门条件的阿贝尔重量4群代数码必然具有码距离为2,而满足对称3-拷贝杯门条件的码可以具有更高的距离,事实上也满足2-拷贝杯门的条件。最后我们找到了来自阿贝尔群代数码乘积的量子码,它们具有码间恒定深度的CZ和CCZ门。

英文摘要:

We determine conditions on classical group algebra codes so that they have pre-orientation for cup products and copy-cup gates. This defines quantum codes that have constant-depth $\operatorname{CZ}$ and $\operatorname{CCZ}$ gates constructed via tensor products of classical group algebra codes, including hypergraph and balanced products. We show that determining the conditions relies on solving the perfect matching problem in graph theory. Conditions are fully determined for the 2- and 3-copy-cup gates, for group algebra codes up to weight 4, including for codes with odd check weight. These include the bivariate bicycle codes, which we show do not have the pre-orientation for either type of copy-cup gate. We show that abelian weight 4 group algebra codes satisfying the non-associative 3-copy-cup gate necessarily have a code distance of 2, whereas codes that satisfy conditions for the symmetric 3-copy-cup gate can have higher distances, and in fact also satisfy conditions for the 2-copy-cup gate. Finally we find examples of quantum codes from the product of abelian group algebra codes that have inter-code constant-depth $\operatorname{CZ}$ and $\operatorname{CCZ}$ gates.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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