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Updated: Jan 31, 2026
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A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
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Beating the Rayleigh Limit Using Two-Photon Interference
Michał Parniak1,2, Sebastian Borówka1, Kajetan Boroszko1
1Faculty of Physics, University of Warsaw, Pasteura 5, 02-093 Warsaw, Poland.
Physical Review Letters
|January 5, 2019
Summary
This study demonstrates that Hong-Ou-Mandel interference with spatially resolved photon detection precisely measures multiple parameters of light sources. This technique overcomes limitations of single-photon measurements for advanced imaging beyond the Rayleigh limit.
Area of Science:
- Quantum optics and photonics
- Quantum metrology and sensing
- Advanced imaging techniques
Background:
- Multiparameter estimation theory provides a framework for imaging beyond the classical Rayleigh limit.
- Optimal measurement of single parameters for light sources is understood, but simultaneous multi-parameter determination remains challenging.
- Simultaneous multi-parameter estimation typically requires complex collective measurements.
Purpose of the Study:
- To theoretically and experimentally investigate a novel method for simultaneous multi-parameter estimation of light sources.
- To overcome the inherent trade-offs associated with single-photon measurements in determining multiple source parameters.
- To achieve precise determination of both separation and centroid for pairs of point emitters.
Main Methods:
- Utilized Hong-Ou-Mandel interference of photons.
- Implemented spatially resolved detection of photons after interference.
- Developed a theoretical framework and conducted experimental validation.
Main Results:
- Demonstrated that Hong-Ou-Mandel interference followed by spatially resolved detection precisely determines emitter separation.
- Showcased the capability to accurately determine the centroid of a pair of point emitters.
- Confirmed the avoidance of trade-offs typically encountered in single-photon measurements for multi-parameter estimation.
Conclusions:
- Hong-Ou-Mandel interference combined with spatially resolved detection offers a robust method for simultaneous multi-parameter estimation.
- This approach advances quantum metrology, enabling more precise characterization of light sources.
- The findings pave the way for improved imaging capabilities beyond the Rayleigh limit.
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