Phys. Rev. A 80, 043804 (2009) [8 pages]Properties of the spatial Wigner function of entangled photon pairsReceived 18 May 2009; published 5 October 2009 In this paper we analyze some important characteristics of the spatial Wigner function of entangled photon pairs. We show that the Wigner description of quantum states that live in the infinite-dimensional space-momentum degree of freedom proves to be particularly useful. We propose an experimental configuration that can be used to retrieve the Wigner function of paired photons entangled in the spatial degree of freedom. In particular, it allows the full characterization of the paired photons emitted from a spontaneous parametric down-conversion source. © 2009 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.80.043804
DOI:
10.1103/PhysRevA.80.043804
PACS:
42.50.Dv
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