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Quantum imaging of a polarisation sensitive phase pattern with hyper-entangled photons.

Manpreet Kaur1, Mandip Singh2

  • 1Department of Physical Sciences, Indian Institute of Science Education and Research (IISER) Mohali, Sector-81, Mohali, 140306, India.

Scientific Reports
|December 9, 2021
PubMed
Summary

This study demonstrates quantum imaging of invisible phase patterns using hyper-entangled photons. The technique allows visualization of polarization-sensitive patterns without photon absorption, advancing quantum optics applications.

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Area of Science:

  • Quantum Optics
  • Quantum Information Science
  • Photonics

Background:

  • Transparent phase patterns can alter photon quantum states without absorption.
  • Quantum entanglement enables imaging of such invisible patterns through joint measurements.
  • Hyper-entanglement utilizes multiple degrees of freedom, like momentum and polarization, for enhanced quantum information processing.

Purpose of the Study:

  • To present a novel quantum imaging technique for transparent, polarization-sensitive phase patterns.
  • To demonstrate the feasibility of imaging using hyper-entangled photon pairs over long distances.
  • To explore the use of joint quantum measurements for reconstructing pattern information.

Main Methods:

  • Utilizing hyper-entangled photon pairs with entangled momentum and polarization.
  • Implementing a long-path free-space experimental setup.
  • Performing joint quantum measurements on one photon interacting with the pattern and its entangled counterpart.

Main Results:

  • Successfully quantum imaged a transparent polarization-sensitive phase pattern.
  • Demonstrated that individual photons do not contain complete image information.
  • Showcased image reconstruction based on correlated measurements of both photons.

Conclusions:

  • The proposed quantum imaging method effectively visualizes invisible phase patterns.
  • Hyper-entangled photons are suitable for high-fidelity quantum imaging applications.
  • This technique offers a non-destructive approach to characterizing polarization-sensitive optical elements.