Please use this identifier to cite or link to this item: https://hdl.handle.net/20.500.12104/68108
Title: Distance-based degrees of polarization for a quantum field
Author: Klimov, Andrei B.
Sanchez-Soto, L.L.
Yustas, E.C.
Soderholm, J.
Bjork, G.
Issue Date: 2005
Abstract: It is well established that unpolarized light is invariant with respect to any SU(2) polarization transformation. This requirement fully characterizes the set of density matrices representing unpolarized states. We introduce the degree of polarization of a quantum state as its distance to the set of unpolarized states. We use two different candidates of distance, namely the Hilbert-Schmidt and the Bures metric, showing that they induce fundamentally different degrees of polarization. We apply these notions to relevant field states and we demonstrate that they avoid some of the problems arising with the classical definition. © 2005 The American Physical Society.
URI: http://hdl.handle.net/20.500.12104/68108
Appears in Collections:Producción científica UdeG (prueba)

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