Entanglement measure for pure M ⊗ N bipartite quantum states
2005 (English)In: Optika i Spektroskopiya, ISSN 0030-4034, Vol. 99, no 3, 398-404 p.Article in journal (Refereed) Published
We propose an entanglement measure for pure M ⊗N bipartite quantum states. We obtain the measure by generalizing the equivalent measure for a 2 ⊗ 2 system, via a 2 ⊗ 3 system, to the general bipartite case. The measure emphasizes the role Bell states have, both for forming the measure, and for experimentally measuring the entanglement. The form of the measure is similar to generalized concurrence. In the case of 2 ⊗ 3 systems, we prove that our measure, that is directly measurable, equals the concurrence. It is also shown that in order to measure the entanglement, it is sufficient to measure the projections of the state onto a maximum of M(M - 1)N(N - 1)/2 Bell states.
Place, publisher, year, edition, pages
2005. Vol. 99, no 3, 398-404 p.
Other Electrical Engineering, Electronic Engineering, Information Engineering
IdentifiersURN: urn:nbn:se:kth:diva-157080ScopusID: 2-s2.0-33750374166OAI: oai:DiVA.org:kth-157080DiVA: diva2:772228
QC 201412162014-12-162014-12-052014-12-16Bibliographically approved