Probing light polarization with the quantum Chernoff bound

Details Probing light polarization with the quantum Chernoff bound Probing light polarization with the quantum Chernoff bound

2010-08-23

arxiv.org/abs/1008.3858v1

Physical Review A 82, 023803 (2010)

Physics

Quantum Physics

Scientific paper

We recall the framework of a consistent quantum description of polarization of light. Accordingly, the degree of polarization of a two-mode state $\hat \rho$ of the quantum radiation field can be defined as a distance of a related state ${\hat \rho}_b$ 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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