A comment on "A semiconductor source of entangled photons"

Abstract

When basic tools of quantum information are applied to the quantum tomography data presented in Nature 439, 179 (2006), none of their devices appears to be a source of entangled photons.

References in corpus (2)

• Separability Criterion for Density Matrices
• Mixed-state entanglement and distillation: is there a ``bound'' entanglement in nature?