We consider an N qubit system and show that in the symmetric subspace, S, a pure state is not globally entangled, iff it is a coherent state. It is also proven that in the orthogonal complement S⊥ all states are globally entangled.
|Number of pages||4|
|Journal||Physics Letters, Section A: General, Atomic and Solid State Physics|
|Publication status||Published - máj. 19 2008|
ASJC Scopus subject areas
- Physics and Astronomy(all)