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Updated: Jul 19, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Ray picture of polarization and coherence in a Young interferometer
1Departmento de Optica, Facultad de Ciencias Fisicas, Universidad Complutense, 20840 Madrid, Spain. alluis@fis.ucm.es
Abstract:
We apply a polarization Wigner formalism to the propagation of polarization in a Young interferometer within paraxial approximation. With a very simple ray picture, we obtain complete and rigorous information about polarization evolution via the superposition of the spatial-angular Stokes parameters associated with three light rays. We compare the degree of polarization in the interference region with several measures of the degree of coherence for vectorial fields.
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