Tuesday, February 28, 2012

1202.5741 (D. Petz et al.)

Conditional SIC-POVMs    [PDF]

D. Petz, L. Ruppert, A. Szanto
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.
View original: http://arxiv.org/abs/1202.5741

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