Nonlocality without entanglement in general multipartite quantum systems

Quantum Nonlocality without Entanglement

Charles H. Bennett, David P. DiVincenzo, Christopher A. Fuchs, Tal Mor, Eric Rains, Peter W. Shor, John A. Smolin, and William K. Wootters IBM Research Division, T. J. Watson Research Center, Yorktown Heights, NY 10598 Norman Bridge Laboratory of Physics 12-33, California Institute of Technology, Pasadena, CA 91125 Département d’Informatique et de Recherche Opérationelle, CP 6128, Succ. Centre-...

Quantum entanglement without eigenvalue spectra: multipartite case

We introduce algebraic sets in the products of the complex projective spaces for the mixed states in multipartite quantum systems, which are independent of their eigenvalues and only measure the “position” of their eigenvectors, as their non-local invariants (ie., remaining invariant after local unitary transformation). The algebraic sets have to be the union of linear subspaces if the multipar...

Title Genuine multipartite entanglement without multipartite correlations

Genuine Multipartite Entanglement without Multipartite Correlations.

Nonclassical correlations between measurement results make entanglement the essence of quantum physics and the main resource for quantum information applications. Surprisingly, there are n-particle states which do not exhibit n-partite correlations at all but still are genuinely n-partite entangled. We introduce a general construction principle for such states, implement them in a multiphoton e...

Entanglement and Quantum Nonlocality Demystified

Département de l’Informatique, UQO, Case postale 1250 ,succursale Hull, Gatineau. Quebec, Canada J8X 3X 7 Abstract. Quantum nonlocality is presented often as the most remarkable and inexplicable phenomenon known to modern science which was confirmed in the experiments proving the violation of Bell Inequalities (BI). It has been known already for a long time that the probabilistic models used to...