Classification of bi-qutrit positive partial transpose entangled edge states by their ranks
Seung-Hyeok Kye, Hiroyuki Osaka · Journal of Mathematical Physics · 2012
We construct 3 ⊗ 3 PPT entangled edge states with maximal ranks, to complete the classification of 3 ⊗ 3 PPT entangled edge states by their types. The ranks of the states and their partial transposes are 8 and 6, respectively. These examples also disprove claims in the literature.