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Comment on: Necessary and sufficient condition of separability of any system

T. Eggeling, K.G.H. Vollbrecht, M.M. Wolf

(2001) quant-ph/0103003 Pfeil

Abstract: In a recent paper (quant-ph/0102133) Chen, Liang, Li and Huang suggest a necessary and sufficient separability criterion, which is supposedly practical in judging the separability of any mixed state. In this note we briefly recapitulate their main result and show that it is a reformulation of the problem rather than a practical criterion.