Iulia Ghiu, Gunnar Bjork, Paulina Marian, and Tudor A. Marian. Probing light polarization with the quantum Chernoff bound. Physical Review A, 82, p. 023803, 2010.
Abstract:
We recall the framework of a consistent quantum description of polarization
of light. Accordingly, the degree of polarization of a twomode 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
twomode states. We explore a distancetype 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.
Keywords:
degree of polarization
URL:
http://pra.aps.org/abstract/PRA/v82/i2/e023803
Posted by
Iulia Ghiu
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