1. The non-H2-reducible matrices and some special complex Hadamard matrices.
- Author
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Liang, Mengfan, Chen, Lin, Long, Fengyue, and Qiu, Xinyu
- Subjects
HADAMARD matrices ,COMPLEX matrices ,LINEAR algebra ,CLASSIFICATION - Abstract
Characterizing the 6 × 6 complex Hadamard matrices (CHMs) is an open problem in linear algebra and quantum information. We name the 6 × 6 CHMs except the H 2 -reducible matrices and the Tao matrix as the non- H 2 -reducible matrices. As far as we know, no non- H 2 -reducible matrices with analytic form have been found. In this paper, we find some non- H 2 -reducible matrices with analytic form. We also characterize some special 6 × 6 CHMs. Using our result one can further narrow the range of MUB trio (a set of four MUBs in C 6 consists of an MUB trio and the identity). Our results may lead to the complete classification of 6 × 6 CHMs and the solution of MUB problem in C 6 . [ABSTRACT FROM AUTHOR]
- Published
- 2024
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