Conditional SIC-POVMs

Details Conditional SIC-POVMs Conditional SIC-POVMs

2012-02-26

arxiv.org/abs/1202.5741v1

Physics

Quantum Physics

12 pages

Scientific paper

In this paper we examine a generalization of the symmetric informationally complete POVMs. SIC-POVMs are the optimal measurements for full quantum tomography, but if some parameters of the density matrix are known, then the optimal SIC POVM should be orthogonal to a subspace. This gives the concept of the conditional SIC-POVM. The existence is not known in general, but we give a result in the special cases when the diagonal is known of the density matrix.

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