Experimentally Friendly Geometrical Criteria for Entanglement
Piotr Badziąg, Časlav Brukner, Wiesław Laskowski, Tomasz Paterek, Marek Żukowski · Physical Review Letters · 2008
A simple geometrical criterion gives experimentally friendly sufficient conditions for entanglement. Its generalization gives a necessary and sufficient condition. It is linked with a family of entanglement identifiers, which is strictly richer than the family of entanglement witnesses.