English

Orthogonal maximal abelian *-subalgebras of the 6x6 matrices

Operator Algebras 2007-05-23 v1 Combinatorics Quantum Physics

Abstract

We construct new pairs of orthogonal maximal abelian *-subalgebras of M6(C)M_6(\mathbb C), by classifying all self-adjoint complex Hadamard matrices of order 6. In particular, we exhibit a non-affine one-parameter family of non-equivalent Hadamard matrices of order 6. In the last part of the paper we present other previously unknown examples of complex Hadamard matrices of higher orders.

Keywords

Cite

@article{arxiv.math/0609076,
  title  = {Orthogonal maximal abelian *-subalgebras of the 6x6 matrices},
  author = {Kyle Beauchamp and Remus Nicoara},
  journal= {arXiv preprint arXiv:math/0609076},
  year   = {2007}
}