Analysis of complete positivity conditions for quantum qutrit channels
arXiv:0809.3882 · doi:10.1103/PhysRevA.80.032322
Abstract
We present an analysis of complete positivity (CP) constraints on qutrit quantum channels that have a form of affine transformations of generalized Bloch vector. For diagonal (damping) channels we derive conditions analogous to the ones that in qubit case produce tetrahedron structure in the channel parameter space.
12 pages, 8 figures (.eps), minor changes in the text and formulas