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Entanglement measure for general pure multipartite quantum states
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.
KTH, Superseded Departments, Microelectronics and Information Technology, IMIT.ORCID iD: 0000-0002-2082-9583
2004 (English)In: Journal of Physics A: Mathematical and General, ISSN 0305-4470, E-ISSN 1361-6447, Vol. 37, no 39, 9251-9260 p.Article in journal (Refereed) Published
Abstract [en]

We propose an explicit formula for a measure of entanglement of pure multipartite quantum states. We discuss the mathematical structure of the measure and give a brief explanation of its physical motivation. We apply the measure on some pure, tripartite, qubit states and demonstrate that, in general, the entanglement can depend on what actions are performed on the various subsystems, and specifically if the parties in possession of the subsystems cooperate or not. We also give some simple but illustrative examples of the entanglement of four-qubit and m-qubit states.

Place, publisher, year, edition, pages
2004. Vol. 37, no 39, 9251-9260 p.
Keyword [en]
relative entropy, separability, systems
National Category
Electrical Engineering, Electronic Engineering, Information Engineering
Identifiers
URN: urn:nbn:se:kth:diva-23830DOI: 10.1088/0305-4470/37/39/012ISI: 000224676300013Scopus ID: 2-s2.0-6344238709OAI: oai:DiVA.org:kth-23830DiVA: diva2:342529
Note
QC 20100525 QC 20110922Available from: 2010-08-10 Created: 2010-08-10 Last updated: 2017-12-12Bibliographically approved

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Björk, Gunnar

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