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Unpolarized states and hidden polarization

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Hoz Iglesias, Pablo de la and Björk, G. and Klimov, A. B. and Leuchs, G. and Sánchez Soto, Luis Lorenzo (2014) Unpolarized states and hidden polarization. Physical review A, 90 (4). 043826/1-043826/6. ISSN 1050-2947

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Official URL: http://journals.aps.org/pra/abstract/10.1103/PhysRevA.90.043826


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Abstract

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 isKth-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.


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©2014 American Physical Society. Financial support from the Swedish Foundation for International Cooperation in Research and Higher Education (STINT), the Swedish Research Council (VR) through its Linnæus Center of Excellence ADOPT and Contract No. 621-2011-4575, the Mexican CONACyT (Grant No. 106525), the EU FP7 (Grant Q-ESSENCE), and the Spanish MINECO (Grant No. FIS2011-26786) is gratefully acknowledged.

Uncontrolled Keywords:Light; Radiation
Subjects:Sciences > Physics > Optics
ID Code:29135
Deposited On:10 Mar 2015 19:07
Last Modified:10 Mar 2015 19:07

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