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Quantum relative phase, m-tangle, and multi-local Lorentz-group invariant
Stockholm University, Faculty of Science, Department of Physics. (Quantum and Field Theory)
2009 (English)In: Quantum Information Processing, ISSN 1570-0755, E-ISSN 1573-1332, Vol. 9, no 2, 233-238 p.Article in journal (Refereed) Published
Abstract [en]

In this paper we define a family of hermitian operators by which to extract what we call quantum-relative-phase properties of a pure or mixed multipartite quantum state, and we relate these properties to known measures of entanglement, namely the m-tangle and the invariant S(m)2S2(m) of the multi-local Lorentz-group SL(2, \mathbbC)ÄmSL(2C)m  . Our construction is based on the orthogonal complement of a positive operator valued measure on quantum phase

Place, publisher, year, edition, pages
Springer Netherlands , 2009. Vol. 9, no 2, 233-238 p.
National Category
Subatomic Physics
Research subject
URN: urn:nbn:se:su:diva-33295DOI: 10.1007/s11128-009-0150-9OAI: diva2:282899
Available from: 2009-12-22 Created: 2009-12-22 Last updated: 2011-10-11Bibliographically approved

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Heydari, Hoshang
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