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Updated: Sep 7, 2025

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

Published on: September 5, 2019

Pixel super-resolution with spatially entangled photons.

Hugo Defienne¹, Patrick Cameron², Bienvenu Ndagano²

¹School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, UK. hugo.defienne@glasgow.ac.uk.

Nature Communications

|June 22, 2022

Summary

This study introduces a quantum imaging technique to double pixel resolution without extra hardware. The method enhances spatial information retrieval in quantum imaging systems limited by sensor technology.

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Area of Science:

Quantum Optics
Image Processing

Background:

Pixelation in imaging systems, particularly quantum imaging with correlated photons, limits spatial resolution due to sensor constraints and acquisition speed.
Undersampling in quantum imaging leads to loss of critical spatial information.

Purpose of the Study:

To develop a pixel super-resolution technique for quantum imaging systems.
To enhance spatial resolution without altering optical setups or relying on prior information.

Main Methods:

Utilizing the full spatially-resolved joint probability distribution (JPD) of spatially-entangled photons.
Applying the JPD technique to various quantum imaging protocols, including quantum illumination and entanglement-enabled quantum holography.

Main Results:

Achieved a twofold increase in pixel resolution for quantum imaging systems.
Successfully retrieved spatial information lost due to undersampling.

Conclusions:

The JPD pixel super-resolution technique significantly improves imaging capabilities in photon-correlation-based quantum imaging.
This advancement facilitates the practical application of quantum imaging technologies.