Conditional SIC-POVMs
Quantum Physics
2012-02-28 v1 Mathematical Physics
math.MP
Abstract
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.
Cite
@article{arxiv.1202.5741,
title = {Conditional SIC-POVMs},
author = {D. Petz and L. Ruppert and A. Szanto},
journal= {arXiv preprint arXiv:1202.5741},
year = {2012}
}
Comments
12 pages