Physics – Quantum Physics
Scientific paper
2007-07-05
Phys. Rev. Lett. 100, 090502 (2008)
Physics
Quantum Physics
5 pages, various changes (title, shortened, references added, corrected typos,...), submitted
Scientific paper
10.1103/PhysRevLett.100.090502
We prove that the correlations present in a multipartite quantum state have an \emph{operational} quantum character as soon as the state does not simply encode a multipartite classical probability distribution, i.e. does not describe the joint state of many classical registers. Even unentangled states may exhibit such \emph{quantumness}, that is pointed out by the new task of \emph{local broadcasting}, i.e. of locally sharing pre-established correlations: this task is feasible if and only if correlations are classical and derive a no-local-broadcasting theorem for quantum correlations. Thus, local broadcasting is able to point out the quantumness of correlations, as standard broadcasting points out the quantum character of single system states. Further, we argue that our theorem implies the standard no-broadcasting theorem for single systems, and that our operative approach leads in a natural way to the definition of measures for quantumness of correlations.
Horodecki Pawel
Horodecki Ryszard
Piani Marco
No associations
LandOfFree
No-local-broadcasting theorem for quantum correlations 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 No-local-broadcasting theorem for quantum correlations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and No-local-broadcasting theorem for quantum correlations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-570003