The Generalized Partial Transposition Criterion for Separability of Multipartite Quantum States
Chen, K, Wu, L A · CERN Document Server (European Organization for Nuclear Research) · 2002
We present a generalized partial transposition separability criterion for the density matrix of a multipartite quantum system. This criterion comprises as special cases the famous Peres-Horodecki criterion and the recent realignment criterion in quant-ph/0202121 and quant-ph/0205017. It involves only straightforward matrix manipulations and is easy to apply. A quantitative measure of entanglement based on this criterion is also obtained.