Convex probability domain of generalized quantum measurements
arXiv:quant-ph/9806024 · doi:10.1088/0305-4470/31/38/003
Abstract
Generalized quantum measurements with N distinct outcomes are used for determining the density matrix, of order d, of an ensemble of quantum systems. The resulting probabilities are represented by a point in an N-dimensional space. It is shown that this point lies in a convex domain having at most d^2-1 dimensions.
7 pages LaTeX, one PostScript figure on separate page