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Information and two-level systems
KTH, School of Engineering Sciences (SCI), Physics.
2006 (English)In: Optics Communications, ISSN 0030-4018, E-ISSN 1873-0310, Vol. 264, no 2, 385-392 p.Article in journal (Refereed) Published
Abstract [en]

I consider the general functions depending on the quantum state represented by a two-level density matrix. Quantities of relevance are state distance and informations measures, i.e. entropies. I introduce a new complex representation of such functions. Utilizing the geometric interpretation of complex mappings, I summarize several properties of such transformations of the state. In particular these results are used to suggest several possible applications to physical questions. These are tentative only, but they indicate the physical relevance of the mathematical results presented.

Place, publisher, year, edition, pages
2006. Vol. 264, no 2, 385-392 p.
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Physical Sciences
Identifiers
URN: urn:nbn:se:kth:diva-37651DOI: 10.1016/j.optcom.2005.12.081ISI: 000239978300019Scopus ID: 2-s2.0-33746703672OAI: oai:DiVA.org:kth-37651DiVA: diva2:434648
Available from: 2011-08-16 Created: 2011-08-16 Last updated: 2017-12-08Bibliographically approved

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