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arXiv · 1008.3858

Probing light polarization with the quantum Chernoff bound

Iulia Ghiu·Gunnar Bjork·Paulina Marian·Tudor A. Marian
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Abstract

We recall the framework of a consistent quantum description of polarization of light. Accordingly, the degree of polarization of a two-mode state $\hat ρ$ of the quantum radiation field can be defined as a distance of a related state ${\hat ρ}_b$ to the convex set of all SU(2) invariant two-mode states. We explore a distance-type polarization measure in terms of the quantum Chernoff bound and derive its explicit expression. A comparison between the Chernoff and Bures degrees of polarization leads to interesting conclusions for some particular states chosen as illustrative examples.

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Iulia Ghiu, Gunnar Bjork, Paulina Marian, Tudor A. Marian. 2010-08-23. Probing light polarization with the quantum Chernoff bound. https://doi.org/10.1103/physreva.82.023803

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