ON TWO WAYS TO LOOK FOR MUTUALLY UNBIASED BASES
ON TWO WAYS TO LOOK FOR MUTUALLY UNBIASED BASES
Two equivalent ways of looking for mutually unbiased bases are discussed in this note. The passage from the search for <em>d</em>+1 mutually unbiased bases in C<sup>d</sup> to the search for <em>d</em>(<em>d</em>+1) vectors in C<sup>d<sup>2</sup></sup> satisfying constraint relations is clarified. Symmetric informationally complete positive-operator-valued measures are briefly discussed in a similar …