Separability and Distillability of Multiparticle Quantum Systems

W. Dür, J. I. Cirac, R. Tarrach
1999 Physical Review Letters  
We present a family of 3--qubit states to which any arbitrary state can be depolarized. We fully classify those states with respect to their separability and distillability properties. This provides a sufficient condition for nonseparability and distillability for arbitrary states. We generalize our results to N--particle states.
doi:10.1103/physrevlett.83.3562 fatcat:hdysbqd2mna4bilwhq6kutzxiu