Concurrence-based entanglement measure for Werner States

Kai Chen, Sergio Albeverio, Shao-Ming Fei

Published 2007-02-02Version 1

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.