Connecting unextendible maximally entangled base with partial Hadamard matrices
Connecting unextendible maximally entangled base with partial Hadamard matrices
复制标题
将不可扩展的最大纠缠基与部分 Hadamard 矩阵连接起来
DOI:
10.1007/s11128-017-1537-7
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发表时间:
2017-03-01
影响因子:
2.5
通讯作者:
Zheng, Zhu-Jun
中科院分区:
文献类型:
--
作者:
Wang, Yan-Ling;Li, Mao-Sheng;Zheng, Zhu-Jun
We study the unextendible maximally entangled bases (UMEB) in C-d circle times C-d and connect the problem to the partial Hadamard matrices. We show that for a given special UMEB in C-d circle times C-d, there is a partial Hadamard matrix which cannot be extended to a Hadamard matrix in C-d. As a corollary, any (d - 1) x d partial Hadamard matrix can be extended to a Hadamard matrix, which answers a conjecture about d = 5. We obtain that for any d there is a UMEB except for d = p or 2p, where p equivalent to 3 mod 4 and p is a prime. The existence of different kinds of constructions of UMEBs in C-nd circle times C-nd for any n is an element of N and d = 3 x 5 x 7 is also discussed.