Quantum entanglement criteria
Aini Syahida Sumairi, Nor Hazmin Sabri, C. H. Raymond Ooi · Journal of Modern Optics · 2013
We review the main criteria used to detect entanglement in quantum systems. The main properties of each criteria are summarized depending on whether the criteria provides a sufficient or necessary condition, whether it involves density matrix or operators, or if the criteria is phase sensitive. We show that several criteria have much in common and they could be related mathematically. We also discuss the features of entanglement which are useful in quantum information technology.