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Entanglement measure for pure M ⊗ N bipartite quantum states
KTH, Skolan för informations- och kommunikationsteknik (ICT), Mikroelektronik och Informationsteknik, IMIT.
KTH, Skolan för informations- och kommunikationsteknik (ICT), Mikroelektronik och Informationsteknik, IMIT.ORCID-id: 0000-0002-2082-9583
2005 (engelsk)Inngår i: Optika i Spektroskopiya, ISSN 0030-4034, Vol. 99, nr 3, s. 398-404Artikkel i tidsskrift (Fagfellevurdert) 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.

sted, utgiver, år, opplag, sider
2005. Vol. 99, nr 3, s. 398-404
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URN: urn:nbn:se:kth:diva-157080Scopus ID: 2-s2.0-33750374166OAI: oai:DiVA.org:kth-157080DiVA, id: diva2:772228
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QC 20141216

Tilgjengelig fra: 2014-12-16 Laget: 2014-12-05 Sist oppdatert: 2014-12-16bibliografisk kontrollert

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