nt - p h / 05 06 12 7 v 1 1 6 Ju n 20 05 The entanglement criterion of multiqubits
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چکیده
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 entanglement distributed by subsystems and shows that we have to evaluate the subsystem entanglements in order to obtain the full description for multiqubit entanglements. Furthermore, we offer an extension of the entanglement to multiqudits. e-mail:[email protected] e-mail:[email protected] e-mail:[email protected]
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تاریخ انتشار 2008