Physics – Quantum Physics
Scientific paper
2012-04-09
Physics
Quantum Physics
18 pages, no figures, comments welcome
Scientific paper
Several definitions of classicality are considered, such as P-representability, generalized coherent states and separable states. These notions are treated under a simple and general definition based on convex sets, which enables the use of the Hahn-Banach theorem to separate classical states from nonclassical ones. Nonclassicality linear witnesses are constructed, based on the observables available in a given physical situation. Some examples of nonclassical states are considered, with detection schemes available nowadays. Reviewing the concept of entanglement potential from a different perspective, it is shown that in some contexts an arbitrary single-system nonclassical state can be converted into a bipartite entangled state, provided a generalized controlled-displacement (e.g., beam-splitter, CNOT gate) is available. Also, this entanglement can be detected in a simple way using the nonclassicality witness of the original single-system state. Finally, we extend the discussion to multipartite states, proposing alternative ways to generate and classify multipartite entanglement.
No associations
LandOfFree
Nonclassicality witnesses and entanglement creation 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 Nonclassicality witnesses and entanglement creation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Nonclassicality witnesses and entanglement creation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-648378