All bipartite entangled states display some hidden nonlocality

Details All bipartite entangled states display some hidden nonlocality All bipartite entangled states display some hidden nonlocality

2007-03-29

arxiv.org/abs/quant-ph/0703268v1

Physical Review Letters, vol 100, art. 090403 (2008)

Physics

Quantum Physics

5 pages, 1 figure

Scientific paper

10.1103/PhysRevLett.100.090403

We show that a violation of the Clauser-Horne-Shimony-Holt (CHSH) inequality can be demonstrated in a certain kind of Bell experiment for all bipartite entangled states. Our protocol allows local filtering measurements and involves shared ancilla states that do not themselves violate CHSH. Our result follows from two main steps. We first provide a simple characterization of the states that violate the CHSH-inequality after local filtering operations in terms of witness-like operators. Second, we prove that for each entangled state $\sigma$, there exists another state $\rho$ not violating CHSH, such that $\rho\otimes\sigma$ violates CHSH. Hence, in this scenario, $\sigma$ cannot be substituted by classical correlations without changing the statistics of the experiment; we say that $\sigma$ is not simulable by classical correlations and our result is that entanglement is equivalent to non-simulability.

Affiliated with

Also associated with

No associations

Rating

All bipartite entangled states display some hidden nonlocality does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with All bipartite entangled states display some hidden nonlocality, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and All bipartite entangled states display some hidden nonlocality will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-711401