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Resolution in Two-Photon Imaging: A Local Manifestation of Entanglement
T Gregory1, E Toninelli1,2, P-A Moreau1,3,4
1School of Physics and Astronomy, University of Glasgow, Glasgow, G12 8QQ, United Kingdom.
ACS Photonics
|October 20, 2025
Summary
Quantum imaging utilizes correlated photon-pairs to achieve a twofold improvement in image resolution, surpassing classical diffraction limits and earlier quantum imaging techniques.
Area of Science:
- Quantum optics
- Microscopy
- Image processing
Background:
- Classical imaging resolution is limited by diffraction.
- Localization microscopy offers improved accuracy by estimating fluorescence distribution centers.
- Quantum imaging with correlated photons was theorized to enhance resolution.
Purpose of the Study:
- To investigate quantum imaging schemes for improving image resolution beyond classical limits.
- To demonstrate a practical method for achieving a factor of 2 improvement in image resolution using quantum imaging.
Main Methods:
- Illuminating an object with correlated photon-pairs.
- Detecting transmitted photon-pairs using a single-photon sensitive camera.
- Employing an image processing algorithm to sum bisector positions of detected photon-pairs.
Main Results:
- Achieved a factor of 2 improvement in image resolution.
- Demonstrated a quantum imaging technique that surpasses the resolution of many previous methods.
- Overcame the diffraction limit inherent in classical imaging systems.
Conclusions:
- Quantum imaging with correlated photon-pairs offers a significant advantage over classical imaging.
- The developed method provides a practical approach to enhance image resolution by a factor of 2.
- This work advances the field of quantum imaging and its potential applications.
