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Entanglement measure for pure M ⊗ N bipartite quantum states
KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.
KTH, School of Information and Communication Technology (ICT), Microelectronics and Information Technology, IMIT.ORCID iD: 0000-0002-2082-9583
2005 (English)In: Optika i Spektroskopiya, ISSN 0030-4034, Vol. 99, no 3, 398-404 p.Article in journal (Refereed) Published
Abstract [en]

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.
National Category
Other Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-157080Scopus ID: 2-s2.0-33750374166OAI: oai:DiVA.org:kth-157080DiVA: diva2:772228
Note

QC 20141216

Available from: 2014-12-16 Created: 2014-12-05 Last updated: 2014-12-16Bibliographically approved

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Björk, Gunnar

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