LETTER TO THE EDITOR: Violation of Bell's inequalities and distillability for N qubits
Abstract
We consider quantum systems composed of N qubits, and the family of all Bell's correlation inequalities for two twovalued measurements per site. We show that if an Nqubit state rho violates any of these inequalities, then it is at least bipartite distillable. Indeed there exists a link between the amount of Bell's inequality violation and the degree of distillability. Thus, we strengthen the interpretation of Bell's inequalities as detectors of useful entanglement.
 Publication:

Journal of Physics A Mathematical General
 Pub Date:
 January 2003
 DOI:
 10.1088/03054470/36/2/101
 arXiv:
 arXiv:quantph/0112102
 Bibcode:
 2003JPhA...36L..21A
 Keywords:

 Quantum Physics
 EPrint:
 6 pages, 3 figures, REVTEX. List of authors extended. Partially rewritten, a rather qualitative explanation of the results. Conclusions unchanged