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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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Two-photon interference of polarization-entangled photons in a Franson interferometer
Heonoh Kim1, Sang Min Lee2, Osung Kwon3
1Department of Physics, Pusan National University, Geumjeong-Gu, Busan, 46241, South Korea.
Scientific Reports
|July 20, 2017
Summary
We demonstrate two-photon interference using polarization-entangled photons in a Franson interferometer, observing Hong-Ou-Mandel interference without a common beamsplitter. This work explores quantum interference effects and entanglement manipulation in photonic systems.
Area of Science:
- Quantum Optics
- Quantum Information Science
- Photonics
Background:
- Two-photon interference is a fundamental quantum phenomenon.
- Franson-type interferometers are used to probe non-classical correlations.
- Hong-Ou-Mandel interference demonstrates the indistinguishability of photons.
Purpose of the Study:
- To investigate two-photon interference with polarization-entangled photons in a polarization-based Franson interferometer.
- To explore the observation of Hong-Ou-Mandel type interference without a common beamsplitter.
- To study spatial quantum beating fringes and entanglement recovery.
Main Methods:
- Utilizing polarization-entangled photon pairs as input.
- Employing a polarization-based Franson-type interferometer.
- Analyzing coincidence detection for interference patterns.
Main Results:
- Observed phase-insensitive Hong-Ou-Mandel type interference peaks and dip fringes.
- Measured spatial quantum beating fringes for non-degenerate photon pairs.
- Successfully recovered polarization entanglement from unentangled photon pairs via delayed compensation.
Conclusions:
- Two-photon interference can occur even when photons do not meet at a common beamsplitter.
- The Franson interferometer facilitates the observation of quantum interference effects and entanglement manipulation.
- The experimental setup demonstrates a method for recovering quantum entanglement.
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