Lower bound on concurrence for arbitrary-dimensional tripartite quantum states.

In this paper, we study the concurrence of arbitrary-dimensional tripartite quantum states. An explicit operational lower bound of concurrence is obtained in terms of the concurrence of substates. A given example shows that our lower bound may improve the well-known existing lower bounds of concurrence. The significance of our result is to get a lower bound when we study the concurrence of arbitrary $$m\otimes n\otimes l$$ -dimensional tripartite quantum states. [ABSTRACT FROM AUTHOR]