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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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Experimental photon addition and subtraction in multi-mode and entangled optical fields.
Optics Letters
|August 15, 2024
Summary
Photon addition and subtraction were compared on quantum fields. Photon-added states generally showed greater nonclassicality than photon-subtracted states, except for thermal states.
Area of Science:
- Quantum Optics
- Quantum Information Science
Background:
- Investigating nonclassical states of light is crucial for quantum technologies.
- Photon addition and subtraction are key methods for manipulating quantum states.
Purpose of the Study:
- To experimentally compare photon addition and subtraction on various quantum fields.
- To assess the nonclassicality and non-Gaussianity of the resulting states.
Main Methods:
- Utilized twin beams (TWBs) with high spatial correlations as initial fields.
- Employed an intensified CCD camera for high-resolution detection.
- Applied up to three-photon addition and subtraction operations.
Main Results:
- Photon-added states generally exhibited higher nonclassicality and non-Gaussianity than photon-subtracted states.
- Photon-subtracted thermal states (TSs) remained classical.
- Photon addition/subtraction on TWBs yielded comparable state properties due to photon pairing.
Conclusions:
- Photon addition is generally more effective in generating nonclassical states than subtraction.
- Twin-beam photon pairing significantly influences the properties of manipulated states.
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