Comment on: Two-qutrit entanglement witnesses and Gell-Mann matrices
Faculty of Mathematics and Information Science
Shaanxi Normal University, Xi’an 710062, P.R. China
a e-mail: firstname.lastname@example.org
Published online: 1 November 2013
Recently, Jafarizadeh et al. [Eur. Phys. J. D 47, 283 (2008)] has constructed several two-qutrit entanglement witnesses based on the Gell-Mann matrices by using the linear programming method, moreover they claimed that all W2 given by equation (16) are entanglement witnesses. In this comment, we would like to point out that there exit some W2 given by equation (16) are not entanglement witnesses in general.
Key words: Quantum information
© EDP Sciences, Società Italiana di Fisica and Springer-Verlag 2013