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Unpolarized states and hidden polarization
KTH, School of Engineering Sciences (SCI), Applied Physics, Quantum Electronics and Quantum Optics, QEO.ORCID iD: 0000-0002-2082-9583
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2014 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 90, no 4, p. 043826-Article in journal (Refereed) Published
Abstract [en]

We capitalize on a multipolar expansion of the polarization density matrix, in which multipoles appear as successive moments of the Stokes variables. When all the multipoles up to a given order K vanish, we can properly say that the state is Kth-order unpolarized, as it lacks of polarization information to that order. First-order unpolarized states coincide with the corresponding classical ones, whereas unpolarized to any order tally with the quantum notion of fully invariant states. In between these two extreme cases, there is a rich variety of situations that are explored here. The existence of hidden polarization emerges in a natural way in this context.

Place, publisher, year, edition, pages
2014. Vol. 90, no 4, p. 043826-
National Category
Atom and Molecular Physics and Optics
Identifiers
URN: urn:nbn:se:kth:diva-156986DOI: 10.1103/PhysRevA.90.043826ISI: 000343942900008Scopus ID: 2-s2.0-84908102206OAI: oai:DiVA.org:kth-156986DiVA, id: diva2:769491
Funder
Swedish Research Council, 106525Available from: 2014-12-08 Created: 2014-12-04 Last updated: 2017-12-05Bibliographically approved

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Björk, Gunnar G.

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