摘要

All complex Hadamard matrices in dimensions two to five are known. We use this fact to derive all inequivalent sets of mutually unbiased (MU) bases in low dimensions. We find a three-parameter family of triples of MU bases in dimension four and two inequivalent classes of MU triples in dimension five. We confirm that the complete sets of (d + 1) MU bases are unique (up to equivalence) in dimensions below six, using only elementary arguments for d less than five.

  • 出版日期2010-9