Ju n 20 05 The entanglement criterion of multiqubits

It is important how to clarify whether a multipartite quantum state is entangled. We suggest an entanglement criterion for multiqubits by using the quantum covariance correlation tensors in pure states, which is the generalization of Schlinz and Mahler’s description. Our criterion explains not only the total entanglement of the system but also the partial… CONTINUE READING