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Updated: May 18, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Innovative method to investigate how the spatial correlation of the pump beam affects the purity of polarization
Simone Cialdi1, Davide Brivio, Andrea Tabacchini
1Dipartimento di Fisica, Università degli Studi di Milano, I-20133 Milan, Italy. simone.cialdi@unimi.it
Abstract:
We present an innovative method to address the relation between the purity of type-I polarization entangled states and the spatial properties of the pump laser beam. Our all-optical apparatus is based on a spatial light modulator, and it offers unprecedented control on the spatial phase function of the entangled states. In this way, we demonstrate quantitatively the relation between the purity of the generated state and the spatial field correlation function of the pump beam.
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