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We have decided to discontinue the publication of preprints on our preprint server as of 1 March 2024. The publication culture within mathematics has changed so much due to the rise of repositories such as ArXiV ( that we are encouraging all institute members to make their preprints available there. An institute's repository in its previous form is, therefore, unnecessary. The preprints published to date will remain available here, but we will not add any new preprints here.

MiS Preprint

Concurrence-Based Entanglement Measure for Werner States

Kai Chen, Sergio Albeverio and Shao-Ming Fei


We give explicit expressions for entanglement measures of Werner states in arbitrary dimensions in terms of concurrence and tangle. We show that an optimal ensemble decomposition for a joint density matrix of a Werner state can achieve the minimum average concurrence and tangle simultaneously. Furthermore, the same decomposition also attains entanglement of formation for Werner states.

Entanglement Measure, Werner states, Concurrence, Tangle

Related publications

2007 Repository Open Access
Kai Chen, Sergio Albeverio and Shao-Ming Fei

Concurrence-based entanglement measure for Werner states

In: Reports on mathematical physics, 58 (2007) 3, pp. 449-458