Abstract
A unified approach to (symmetric informationally complete) positive operator valued measures (SIC-POVMs) and mutually unbiased bases (MUBs) is developed. The approach is based on the use of Racah unit tensors for the Wigner-Racah algebra of SU(2) ⊃ U(1). Emphasis is put on similarities and differences between SIC-POVMs and MUBs.
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