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Updated: Jan 24, 2026

A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
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Quantum phase-sensitive diffraction and imaging using entangled photons.

Shahaf Asban1,2, Konstantin E Dorfman3, Shaul Mukamel1,2

  • 1Department of Chemistry, University of California, Irvine, CA 92697-2025; smukamel@uci.edu sasban@uci.edu dorfmank@lps.ecnu.edu.cn.

Proceedings of the National Academy of Sciences of the United States of America
|May 25, 2019
PubMed
Summary
This summary is machine-generated.

This study introduces quantum diffraction imaging using entangled photons. This technique enables high-resolution imaging of delicate samples with weak fields, improving signal-to-noise ratio and preventing damage.

Keywords:
entangled photonsphase-sensitive imagingquantum diffractionquantum imaging

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Area of Science:

  • Quantum optics
  • Diffraction imaging
  • Quantum sensing

Background:

  • Classical diffraction imaging is limited by sample damage from high-intensity fields.
  • Quantum entanglement offers novel approaches to overcome classical limitations in imaging.

Purpose of the Study:

  • To develop a quantum diffraction imaging technique using entangled photons.
  • To enable high signal-to-noise ratio imaging with minimal sample damage.

Main Methods:

  • Utilizing one photon from an entangled pair for diffraction off a sample.
  • Detecting the diffracted photon in coincidence with its entangled twin.
  • Scanning the non-interacting photon to reconstruct the image.
  • Applying Schmidt decomposition for image enhancement.

Main Results:

  • Phase information from dynamical quantum systems is imprinted in the field state.
  • Signal contribution scales favorably with source intensity compared to classical diffraction.
  • Demonstrated feasibility of imaging with weak fields, reducing sample damage.

Conclusions:

  • Quantum diffraction imaging offers a sensitive and non-destructive method for high-resolution imaging.
  • Entangled photon techniques provide enhanced signal-to-noise ratios for delicate samples.
  • Image enhancement is achievable through manipulation of Schmidt modes.